57442356 has 36 divisors (see below), whose sum is σ = 145777632. Its totient is φ = 19071504.

The previous prime is 57442351. The next prime is 57442369. The reversal of 57442356 is 65324475.

It is a tau number, because it is divible by the number of its divisors (36).

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 57442356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57442351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6435 + ... + 12501.

Almost surely, 2^57442356 is an apocalyptic number.

It is an amenable number.

57442356 is an abundant number, since it is smaller than the sum of its proper divisors (88335276).

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

57442356 is a wasteful number, since it uses less digits than its factorization.

57442356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340 (or 6335 counting only the distinct ones).

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

The square root of 57442356 is about 7579.0735581600. The cubic root of 57442356 is about 385.8431087632.

It can be divided in two parts, 5744 and 2356, that added together give a square (8100 = 90²).

The spelling of 57442356 in words is "fifty-seven million, four hundred forty-two thousand, three hundred fifty-six".