51990328 has 64 divisors (see below), whose sum is σ = 110124000. Its totient is φ = 22851072.

The previous prime is 51990307. The next prime is 51990343. The reversal of 51990328 is 82309915.

51990328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 226918 + ... + 227146.

Almost surely, 2^51990328 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 51990328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55062000).

51990328 is an abundant number, since it is smaller than the sum of its proper divisors (58133672).

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

51990328 is a wasteful number, since it uses less digits than its factorization.

51990328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 51990328 is about 7210.4318872034. The cubic root of 51990328 is about 373.2279726776.

The spelling of 51990328 in words is "fifty-one million, nine hundred ninety thousand, three hundred twenty-eight".