52491276 has 72 divisors (see below), whose sum is σ = 138640320. Its totient is φ = 16724736.

The previous prime is 52491269. The next prime is 52491323. The reversal of 52491276 is 67219425.

52491276 is a `hidden beast` number, since 524 + 9 + 127 + 6 = 666.

It is a super-2 number, since 2×52491276² = 5510668112216352, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 52491276.

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, 142845 + ... + 143211.

It is an arithmetic number, because the mean of its divisors is an integer number (1925560).

Almost surely, 2^52491276 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 52491276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69320160).

52491276 is an abundant number, since it is smaller than the sum of its proper divisors (86149044).

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

52491276 is a wasteful number, since it uses less digits than its factorization.

52491276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 538 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 52491276 is about 7245.0863348893. The cubic root of 52491276 is about 374.4228776016.

The spelling of 52491276 in words is "fifty-two million, four hundred ninety-one thousand, two hundred seventy-six".