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157254284 = 221117210233
BaseRepresentation
bin10010101111110…
…00001010001100
3101221220100022202
421113320022030
5310224114114
623334301032
73616432205
oct1127701214
9357810282
10157254284
1180847520
12447b7778
132676ba95
1416c565ac
15dc13cde
hex95f828c

157254284 has 24 divisors (see below), whose sum is σ = 317873808. Its totient is φ = 67274240.

The previous prime is 157254283. The next prime is 157254299. The reversal of 157254284 is 482452751.

It is not an unprimeable number, because it can be changed into a prime (157254281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104369 + ... + 105864.

It is an arithmetic number, because the mean of its divisors is an integer number (13244742).

Almost surely, 2157254284 is an apocalyptic number.

It is an amenable number.

157254284 is an abundant number, since it is smaller than the sum of its proper divisors (160619524).

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

157254284 is a wasteful number, since it uses less digits than its factorization.

157254284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210265 (or 210263 counting only the distinct ones).

The product of its digits is 89600, while the sum is 38.

The square root of 157254284 is about 12540.1070170872. The cubic root of 157254284 is about 539.7601632701.

The spelling of 157254284 in words is "one hundred fifty-seven million, two hundred fifty-four thousand, two hundred eighty-four".

Divisors: 1 2 4 11 17 22 34 44 68 187 374 748 210233 420466 840932 2312563 3573961 4625126 7147922 9250252 14295844 39313571 78627142 157254284