52691472 has 100 divisors (see below), whose sum is σ = 154316140. Its totient is φ = 17356032.

The previous prime is 52691461. The next prime is 52691477. The reversal of 52691472 is 27419625.

52691472 is a `hidden beast` number, since 526 + 91 + 47 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32764176 + 19927296 = 5724^2 + 4464^2 .

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 (52691477) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 141078 + ... + 141450.

Almost surely, 2^52691472 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 52691472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77158070).

52691472 is an abundant number, since it is smaller than the sum of its proper divisors (101624668).

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

52691472 is a wasteful number, since it uses less digits than its factorization.

52691472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 487 counting only the distinct ones).

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

The square root of 52691472 is about 7258.8891712162. The cubic root of 52691472 is about 374.8982764087.

The spelling of 52691472 in words is "fifty-two million, six hundred ninety-one thousand, four hundred seventy-two".