53646372 has 72 divisors (see below), whose sum is σ = 147987840. Its totient is φ = 16286400.

The previous prime is 53646371. The next prime is 53646377. The reversal of 53646372 is 27364635.

53646372 is a `hidden beast` number, since 5 + 3 + 646 + 3 + 7 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 (53646371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36247 + ... + 37697.

Almost surely, 2^53646372 is an apocalyptic number.

53646372 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53646372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73993920).

53646372 is an abundant number, since it is smaller than the sum of its proper divisors (94341468).

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

53646372 is a wasteful number, since it uses less digits than its factorization.

53646372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1548 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 53646372 is about 7324.3683686718. The cubic root of 53646372 is about 377.1494270304.

The spelling of 53646372 in words is "fifty-three million, six hundred forty-six thousand, three hundred seventy-two".