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12152988 = 2232337583
BaseRepresentation
bin101110010111…
…000010011100
3211212102202200
4232113002130
511102343423
61112251500
7205204311
oct56270234
924772680
1012152988
1169507a1
1240a0b90
132696823
141884d08
151100d43
hexb9709c

12152988 has 18 divisors (see below), whose sum is σ = 30720144. Its totient is φ = 4050984.

The previous prime is 12152971. The next prime is 12153013. The reversal of 12152988 is 88925121.

12152988 is a `hidden beast` number, since 121 + 529 + 8 + 8 = 666.

12152988 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 337583 = 12152988 / (1 + 2 + 1 + 5 + 2 + 9 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168756 + ... + 168827.

Almost surely, 212152988 is an apocalyptic number.

12152988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12152988 is an abundant number, since it is smaller than the sum of its proper divisors (18567156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12152988 is a wasteful number, since it uses less digits than its factorization.

12152988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337593 (or 337588 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12152988 is about 3486.1135953953. The cubic root of 12152988 is about 229.9116737091.

The spelling of 12152988 in words is "twelve million, one hundred fifty-two thousand, nine hundred eighty-eight".

Divisors: 1 2 3 4 6 9 12 18 36 337583 675166 1012749 1350332 2025498 3038247 4050996 6076494 12152988