23489720 has 32 divisors (see below), whose sum is σ = 54144720. Its totient is φ = 9166080.

The previous prime is 23489717. The next prime is 23489737. The reversal of 23489720 is 2798432.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522 + ... + 8801.

Almost surely, 2^23489720 is an apocalyptic number.

23489720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23489720 is an abundant number, since it is smaller than the sum of its proper divisors (30655000).

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

23489720 is a wasteful number, since it uses less digits than its factorization.

23489720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14375 (or 14371 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 23489720 is about 4846.6194403935. The cubic root of 23489720 is about 286.3909433483.

The spelling of 23489720 in words is "twenty-three million, four hundred eighty-nine thousand, seven hundred twenty".