23933440 has 40 divisors (see below), whose sum is σ = 57390300. Its totient is φ = 9572352.

The previous prime is 23933431. The next prime is 23933443. The reversal of 23933440 is 4433932.

It can be written as a sum of positive squares in 2 ways, for example, as 23503104 + 430336 = 4848^2 + 656^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 23933399 and 23933408.

It is not an unprimeable number, because it can be changed into a prime (23933443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2115 + ... + 7234.

Almost surely, 2^23933440 is an apocalyptic number.

23933440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23933440 is an abundant number, since it is smaller than the sum of its proper divisors (33456860).

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

23933440 is an frugal number, since it uses more digits than its factorization.

23933440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9372 (or 9356 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 23933440 is about 4892.1815174828. The cubic root of 23933440 is about 288.1830112518.

The spelling of 23933440 in words is "twenty-three million, nine hundred thirty-three thousand, four hundred forty".