51984036 has 72 divisors (see below), whose sum is σ = 142377144. Its totient is φ = 15897600.

The previous prime is 51984029. The next prime is 51984041. The reversal of 51984036 is 63048915.

It can be written as a sum of positive squares in 4 ways, for example, as 6502500 + 45481536 = 2550^2 + 6744^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129436 + ... + 129836.

Almost surely, 2^51984036 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 51984036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71188572).

51984036 is an abundant number, since it is smaller than the sum of its proper divisors (90393108).

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

51984036 is a wasteful number, since it uses less digits than its factorization.

51984036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51984036 is about 7209.9955617185. The cubic root of 51984036 is about 373.2129157415.

The spelling of 51984036 in words is "fifty-one million, nine hundred eighty-four thousand, thirty-six".