23012840 has 32 divisors (see below), whose sum is σ = 52164000. Its totient is φ = 9136704.

The previous prime is 23012839. The next prime is 23012861. The reversal of 23012840 is 4821032.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3491 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (1630125).

Almost surely, 2^23012840 is an apocalyptic number.

23012840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012840 is an abundant number, since it is smaller than the sum of its proper divisors (29151160).

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

23012840 is a wasteful number, since it uses less digits than its factorization.

23012840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 23012840 is about 4797.1699990724. The cubic root of 23012840 is about 284.4396087955.

Adding to 23012840 its reverse (4821032), we get a palindrome (27833872).

The spelling of 23012840 in words is "twenty-three million, twelve thousand, eight hundred forty".