23102840 has 32 divisors (see below), whose sum is σ = 52284960. Its totient is φ = 9187200.

The previous prime is 23102819. The next prime is 23102851. The reversal of 23102840 is 4820132.

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

It is a congruent number.

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, 5645 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (1633905).

Almost surely, 2^23102840 is an apocalyptic number.

23102840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23102840 is an abundant number, since it is smaller than the sum of its proper divisors (29182120).

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

23102840 is a wasteful number, since it uses less digits than its factorization.

23102840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383 (or 3379 counting only the distinct ones).

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

The square root of 23102840 is about 4806.5413760832. The cubic root of 23102840 is about 284.8099276407.

Adding to 23102840 its reverse (4820132), we get a palindrome (27922972).

The spelling of 23102840 in words is "twenty-three million, one hundred two thousand, eight hundred forty".