51690672 has 60 divisors (see below), whose sum is σ = 157818024. Its totient is φ = 15663360.

The previous prime is 51690649. The next prime is 51690677. The reversal of 51690672 is 27609615.

It is a super-3 number, since 3×51690672³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51690677) 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, 14733 + ... + 17900.

Almost surely, 2^51690672 is an apocalyptic number.

It is an amenable number.

51690672 is an abundant number, since it is smaller than the sum of its proper divisors (106127352).

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

51690672 is a wasteful number, since it uses less digits than its factorization.

51690672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32658 (or 32649 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 51690672 is about 7189.6225213846. The cubic root of 51690672 is about 372.5095341613.

The spelling of 51690672 in words is "fifty-one million, six hundred ninety thousand, six hundred seventy-two".