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23391930 = 235779731
BaseRepresentation
bin101100100111…
…0111010111010
31122000102200210
41121032322322
521442020210
62153211550
7402554022
oct131167272
948012623
1023391930
1112227781
127a00bb6
134b002a3
14316ca82
1520c0e20
hex164eeba

23391930 has 16 divisors (see below), whose sum is σ = 56140704. Its totient is φ = 6237840.

The previous prime is 23391923. The next prime is 23391941. The reversal of 23391930 is 3919332.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 779731 = 23391930 / (2 + 3 + 3 + 9 + 1 + 9 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389836 + ... + 389895.

It is an arithmetic number, because the mean of its divisors is an integer number (3508794).

Almost surely, 223391930 is an apocalyptic number.

23391930 is an abundant number, since it is smaller than the sum of its proper divisors (32748774).

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

23391930 is a wasteful number, since it uses less digits than its factorization.

23391930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779741.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 23391930 is about 4836.5204434593. The cubic root of 23391930 is about 285.9929660682.

The spelling of 23391930 in words is "twenty-three million, three hundred ninety-one thousand, nine hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 779731 1559462 2339193 3898655 4678386 7797310 11695965 23391930