23289540 has 24 divisors (see below), whose sum is σ = 65210880. Its totient is φ = 6210528.

The previous prime is 23289533. The next prime is 23289557. The reversal of 23289540 is 4598232.

It is a happy 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, 194020 + ... + 194139.

It is an arithmetic number, because the mean of its divisors is an integer number (2717120).

Almost surely, 2^23289540 is an apocalyptic number.

23289540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23289540 is an abundant number, since it is smaller than the sum of its proper divisors (41921340).

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

23289540 is a wasteful number, since it uses less digits than its factorization.

23289540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388171 (or 388169 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 23289540 is about 4825.9237457714. The cubic root of 23289540 is about 285.5750776611.

The spelling of 23289540 in words is "twenty-three million, two hundred eighty-nine thousand, five hundred forty".