57235420 has 72 divisors (see below), whose sum is σ = 134466192. Its totient is φ = 20444160.

The previous prime is 57235363. The next prime is 57235427. The reversal of 57235420 is 2453275.

57235420 = T₄₀₉ + T₄₁₀ + ... + T₇₄₃.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57235427) 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, 161964 + ... + 162316.

It is an arithmetic number, because the mean of its divisors is an integer number (1867586).

Almost surely, 2^57235420 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 57235420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67233096).

57235420 is an abundant number, since it is smaller than the sum of its proper divisors (77230772).

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

57235420 is a wasteful number, since it uses less digits than its factorization.

57235420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 57235420 is about 7565.4094403410. The cubic root of 57235420 is about 385.3792181909.

Adding to 57235420 its reverse (2453275), we get a palindrome (59688695).

The spelling of 57235420 in words is "fifty-seven million, two hundred thirty-five thousand, four hundred twenty".