23640402 has 16 divisors (see below), whose sum is σ = 47467872. Its totient is φ = 7848960.

The previous prime is 23640401. The next prime is 23640403. The reversal of 23640402 is 20404632.

It is an interprime number because it is at equal distance from previous prime (23640401) and next prime (23640403).

It is not an unprimeable number, because it can be changed into a prime (23640401) 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, 6124 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (2966742).

Almost surely, 2^23640402 is an apocalyptic number.

23640402 is an abundant number, since it is smaller than the sum of its proper divisors (23827470).

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

23640402 is a wasteful number, since it uses less digits than its factorization.

23640402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15593.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 23640402 is about 4862.1396524575. The cubic root of 23640402 is about 287.0020193539.

It can be divided in two parts, 23640 and 402, that added together give a palindrome (24042).

The spelling of 23640402 in words is "twenty-three million, six hundred forty thousand, four hundred two".