57146240 has 64 divisors (see below), whose sum is σ = 141372000. Its totient is φ = 22063104.

The previous prime is 57146227. The next prime is 57146249. The reversal of 57146240 is 4264175.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×57146240² = 6531385492275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57146249) 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, 17021 + ... + 20099.

Almost surely, 2^57146240 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 57146240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70686000).

57146240 is an abundant number, since it is smaller than the sum of its proper divisors (84225760).

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

57146240 is a wasteful number, since it uses less digits than its factorization.

57146240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 57146240 is about 7559.5132118411. The cubic root of 57146240 is about 385.1789576756.

The spelling of 57146240 in words is "fifty-seven million, one hundred forty-six thousand, two hundred forty".