23372840 has 32 divisors (see below), whose sum is σ = 54405000. Its totient is φ = 9026304.

The previous prime is 23372809. The next prime is 23372851. The reversal of 23372840 is 4827332.

It can be written as a sum of positive squares in 4 ways, for example, as 18541636 + 4831204 = 4306^2 + 2198^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 8915 + ... + 11234.

Almost surely, 2^23372840 is an apocalyptic number.

23372840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23372840 is an abundant number, since it is smaller than the sum of its proper divisors (31032160).

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

23372840 is a wasteful number, since it uses less digits than its factorization.

23372840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20189 (or 20185 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 23372840 is about 4834.5465144106. The cubic root of 23372840 is about 285.9151459029.

The spelling of 23372840 in words is "twenty-three million, three hundred seventy-two thousand, eight hundred forty".