51890032 has 40 divisors (see below), whose sum is σ = 104457600. Its totient is φ = 24944640.

The previous prime is 51890029. The next prime is 51890057. The reversal of 51890032 is 23009815.

It is a super-2 number, since 2×51890032² = 5385150841922048, which contains 22 as substring.

It is a congruent number.

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, 115344 + ... + 115792.

It is an arithmetic number, because the mean of its divisors is an integer number (2611440).

Almost surely, 2^51890032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51890032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52228800).

51890032 is an abundant number, since it is smaller than the sum of its proper divisors (52567568).

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

51890032 is a wasteful number, since it uses less digits than its factorization.

51890032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51890032 is about 7203.4736065318. The cubic root of 51890032 is about 372.9878166639.

Adding to 51890032 its reverse (23009815), we get a palindrome (74899847).

The spelling of 51890032 in words is "fifty-one million, eight hundred ninety thousand, thirty-two".