51978788 has 12 divisors (see below), whose sum is σ = 94099740. Its totient is φ = 25093152.

The previous prime is 51978779. The next prime is 51978791. The reversal of 51978788 is 88787915.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37063744 + 14915044 = 6088^2 + 3862^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223931 + ... + 224162.

It is an arithmetic number, because the mean of its divisors is an integer number (7841645).

Almost surely, 2^51978788 is an apocalyptic number.

51978788 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51978788 is a deficient number, since it is larger than the sum of its proper divisors (42120952).

51978788 is a wasteful number, since it uses less digits than its factorization.

51978788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448126 (or 448124 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 53.

The square root of 51978788 is about 7209.6316133350. The cubic root of 51978788 is about 373.2003561979.

The spelling of 51978788 in words is "fifty-one million, nine hundred seventy-eight thousand, seven hundred eighty-eight".