51290368 has 72 divisors (see below), whose sum is σ = 110670336. Its totient is φ = 23654400.

The previous prime is 51290363. The next prime is 51290381. The reversal of 51290368 is 86309215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51290363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182388 + ... + 182668.

It is an arithmetic number, because the mean of its divisors is an integer number (1537088).

Almost surely, 2^51290368 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 51290368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55335168).

51290368 is an abundant number, since it is smaller than the sum of its proper divisors (59379968).

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

51290368 is a wasteful number, since it uses less digits than its factorization.

51290368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 51290368 is about 7161.7294000821. The cubic root of 51290368 is about 371.5454423996.

The spelling of 51290368 in words is "fifty-one million, two hundred ninety thousand, three hundred sixty-eight".