51860980 has 24 divisors (see below), whose sum is σ = 110696040. Its totient is φ = 20403840.

The previous prime is 51860971. The next prime is 51860983. The reversal of 51860980 is 8906815.

It can be written as a sum of positive squares in 4 ways, for example, as 4691556 + 47169424 = 2166^2 + 6868^2 .

It is a super-2 number, since 2×51860980² = 5379122493120800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51860983) 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, 20035 + ... + 22474.

It is an arithmetic number, because the mean of its divisors is an integer number (4612335).

Almost surely, 2^51860980 is an apocalyptic number.

It is an amenable number.

51860980 is an abundant number, since it is smaller than the sum of its proper divisors (58835060).

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

51860980 is a wasteful number, since it uses less digits than its factorization.

51860980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42579 (or 42577 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 51860980 is about 7201.4567970654. The cubic root of 51860980 is about 372.9181946541.

The spelling of 51860980 in words is "fifty-one million, eight hundred sixty thousand, nine hundred eighty".