23149290 has 16 divisors (see below), whose sum is σ = 55558368. Its totient is φ = 6173136.

The previous prime is 23149289. The next prime is 23149307. The reversal of 23149290 is 9294132.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 771643 = 23149290 / (2 + 3 + 1 + 4 + 9 + 2 + 9 + 0).

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, 385792 + ... + 385851.

It is an arithmetic number, because the mean of its divisors is an integer number (3472398).

Almost surely, 2^23149290 is an apocalyptic number.

23149290 is an abundant number, since it is smaller than the sum of its proper divisors (32409078).

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

23149290 is a wasteful number, since it uses less digits than its factorization.

23149290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771653.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 23149290 is about 4811.3709065089. The cubic root of 23149290 is about 285.0006771298. Note that the first 3 decimals are identical.

The spelling of 23149290 in words is "twenty-three million, one hundred forty-nine thousand, two hundred ninety".