23099640 has 32 divisors (see below), whose sum is σ = 69299280. Its totient is φ = 6159872.

The previous prime is 23099639. The next prime is 23099641. The reversal of 23099640 is 4699032.

It is an interprime number because it is at equal distance from previous prime (23099639) and next prime (23099641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23099641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96129 + ... + 96368.

Almost surely, 2^23099640 is an apocalyptic number.

23099640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23099640 is an abundant number, since it is smaller than the sum of its proper divisors (46199640).

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

23099640 is a wasteful number, since it uses less digits than its factorization.

23099640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192511 (or 192507 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 23099640 is about 4806.2084848662. The cubic root of 23099640 is about 284.7967772539.

The spelling of 23099640 in words is "twenty-three million, ninety-nine thousand, six hundred forty".