23491040 has 24 divisors (see below), whose sum is σ = 55497960. Its totient is φ = 9396352.

The previous prime is 23491033. The next prime is 23491057. The reversal of 23491040 is 4019432.

It is a junction number, because it is equal to n+sod(n) for n = 23490997 and 23491015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73250 + ... + 73569.

It is an arithmetic number, because the mean of its divisors is an integer number (2312415).

Almost surely, 2^23491040 is an apocalyptic number.

23491040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23491040 is an abundant number, since it is smaller than the sum of its proper divisors (32006920).

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

23491040 is a wasteful number, since it uses less digits than its factorization.

23491040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146834 (or 146826 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 23491040 is about 4846.7556158734. The cubic root of 23491040 is about 286.3963078080.

The spelling of 23491040 in words is "twenty-three million, four hundred ninety-one thousand, forty".