51626490 has 32 divisors (see below), whose sum is σ = 129292416. Its totient is φ = 13168320.

The previous prime is 51626489. The next prime is 51626521. The reversal of 51626490 is 9462615.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36721 + ... + 38100.

It is an arithmetic number, because the mean of its divisors is an integer number (4040388).

Almost surely, 2^51626490 is an apocalyptic number.

51626490 is an abundant number, since it is smaller than the sum of its proper divisors (77665926).

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

51626490 is a wasteful number, since it uses less digits than its factorization.

51626490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74854.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 51626490 is about 7185.1576183129. The cubic root of 51626490 is about 372.3552941527.

The spelling of 51626490 in words is "fifty-one million, six hundred twenty-six thousand, four hundred ninety".