51890442 has 16 divisors (see below), whose sum is σ = 104479200. Its totient is φ = 17180432.

The previous prime is 51890437. The next prime is 51890453. The reversal of 51890442 is 24409815.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28128 + ... + 29915.

It is an arithmetic number, because the mean of its divisors is an integer number (6529950).

Almost surely, 2^51890442 is an apocalyptic number.

51890442 is an abundant number, since it is smaller than the sum of its proper divisors (52588758).

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

51890442 is a wasteful number, since it uses less digits than its factorization.

51890442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58197.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 51890442 is about 7203.5020649681. The cubic root of 51890442 is about 372.9887990273.

The spelling of 51890442 in words is "fifty-one million, eight hundred ninety thousand, four hundred forty-two".