51860620 has 36 divisors (see below), whose sum is σ = 126690480. Its totient is φ = 17780448.

The previous prime is 51860617. The next prime is 51860621. The reversal of 51860620 is 2606815.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51860621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25480 + ... + 27439.

It is an arithmetic number, because the mean of its divisors is an integer number (3519180).

Almost surely, 2^51860620 is an apocalyptic number.

It is an amenable number.

51860620 is an abundant number, since it is smaller than the sum of its proper divisors (74829860).

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

51860620 is a wasteful number, since it uses less digits than its factorization.

51860620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52942 (or 52933 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51860620 is about 7201.4318020794. The cubic root of 51860620 is about 372.9173317647.

The spelling of 51860620 in words is "fifty-one million, eight hundred sixty thousand, six hundred twenty".