235542640 has 40 divisors (see below), whose sum is σ = 566526240. Its totient is φ = 90967296.

The previous prime is 235542623. The next prime is 235542641. The reversal of 235542640 is 46245532.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235542641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48444 + ... + 53083.

It is an arithmetic number, because the mean of its divisors is an integer number (14163156).

Almost surely, 2^235542640 is an apocalyptic number.

235542640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

235542640 is an abundant number, since it is smaller than the sum of its proper divisors (330983600).

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

235542640 is a wasteful number, since it uses less digits than its factorization.

235542640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101569 (or 101563 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 235542640 is about 15347.3984766149. The cubic root of 235542640 is about 617.5751977789.

The spelling of 235542640 in words is "two hundred thirty-five million, five hundred forty-two thousand, six hundred forty".