23530290 has 48 divisors (see below), whose sum is σ = 65696832. Its totient is φ = 5378016.

The previous prime is 23530259. The next prime is 23530307. The reversal of 23530290 is 9203532.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23530290.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6534 + ... + 9473.

It is an arithmetic number, because the mean of its divisors is an integer number (1368684).

Almost surely, 2^23530290 is an apocalyptic number.

23530290 is an abundant number, since it is smaller than the sum of its proper divisors (42166542).

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

23530290 is a wasteful number, since it uses less digits than its factorization.

23530290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031 (or 16024 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 23530290 is about 4850.8030263040. The cubic root of 23530290 is about 286.5557274588. Note that the first 3 decimals are identical.

The spelling of 23530290 in words is "twenty-three million, five hundred thirty thousand, two hundred ninety".