57445632 has 72 divisors (see below), whose sum is σ = 169897280. Its totient is φ = 19146240.

The previous prime is 57445621. The next prime is 57445637. The reversal of 57445632 is 23654475.

57445632 is a `hidden beast` number, since 57 + 44 + 563 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57445637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2757 + ... + 11067.

Almost surely, 2^57445632 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 57445632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84948640).

57445632 is an abundant number, since it is smaller than the sum of its proper divisors (112451648).

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

57445632 is an equidigital number, since it uses as much as digits as its factorization.

57445632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8336 (or 8316 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 57445632 is about 7579.2896764802. The cubic root of 57445632 is about 385.8504436411.

The spelling of 57445632 in words is "fifty-seven million, four hundred forty-five thousand, six hundred thirty-two".