57355420 has 12 divisors (see below), whose sum is σ = 120446424. Its totient is φ = 22942160.

The previous prime is 57355391. The next prime is 57355423. The reversal of 57355420 is 2455375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57355423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433866 + ... + 1433905.

It is an arithmetic number, because the mean of its divisors is an integer number (10037202).

Almost surely, 2^57355420 is an apocalyptic number.

It is an amenable number.

57355420 is an abundant number, since it is smaller than the sum of its proper divisors (63091004).

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

57355420 is a wasteful number, since it uses less digits than its factorization.

57355420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867780 (or 2867778 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 57355420 is about 7573.3361208915. The cubic root of 57355420 is about 385.6483593642.

It can be divided in two parts, 57355 and 420, that added together give a palindrome (57775).

The spelling of 57355420 in words is "fifty-seven million, three hundred fifty-five thousand, four hundred twenty".