236430640 has 40 divisors (see below), whose sum is σ = 552027168. Its totient is φ = 94172160.

The previous prime is 236430631. The next prime is 236430643. The reversal of 236430640 is 46034632.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 236430599 and 236430608.

It is not an unprimeable number, because it can be changed into a prime (236430643) 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, 13149 + ... + 25411.

Almost surely, 2^236430640 is an apocalyptic number.

236430640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

236430640 is an abundant number, since it is smaller than the sum of its proper divisors (315596528).

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

236430640 is a wasteful number, since it uses less digits than its factorization.

236430640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12517 (or 12511 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 236430640 is about 15376.3012457483. The cubic root of 236430640 is about 618.3503144027.

The spelling of 236430640 in words is "two hundred thirty-six million, four hundred thirty thousand, six hundred forty".