51628290 has 32 divisors (see below), whose sum is σ = 141609600. Its totient is φ = 11800704.

The previous prime is 51628267. The next prime is 51628309. The reversal of 51628290 is 9282615.

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, 122715 + ... + 123134.

It is an arithmetic number, because the mean of its divisors is an integer number (4425300).

Almost surely, 2^51628290 is an apocalyptic number.

51628290 is an abundant number, since it is smaller than the sum of its proper divisors (89981310).

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

51628290 is a wasteful number, since it uses less digits than its factorization.

51628290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245866.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 51628290 is about 7185.2828754336. The cubic root of 51628290 is about 372.3596215935.

The spelling of 51628290 in words is "fifty-one million, six hundred twenty-eight thousand, two hundred ninety".