23291040 has 48 divisors (see below), whose sum is σ = 73368288. Its totient is φ = 6210816.

The previous prime is 23291039. The next prime is 23291057. The reversal of 23291040 is 4019232.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 23290998 and 23291016.

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, 23782 + ... + 24741.

It is an arithmetic number, because the mean of its divisors is an integer number (1528506).

Almost surely, 2^23291040 is an apocalyptic number.

23291040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23291040 is an abundant number, since it is smaller than the sum of its proper divisors (50077248).

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

23291040 is a wasteful number, since it uses less digits than its factorization.

23291040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48541 (or 48533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23291040 is about 4826.0791539302. The cubic root of 23291040 is about 285.5812085024.

The spelling of 23291040 in words is "twenty-three million, two hundred ninety-one thousand, forty".