57266240 has 56 divisors (see below), whose sum is σ = 138452352. Its totient is φ = 22556160.

The previous prime is 57266219. The next prime is 57266263. The reversal of 57266240 is 4266275.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 57266197 and 57266206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20105 + ... + 22775.

Almost surely, 2^57266240 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 57266240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69226176).

57266240 is an abundant number, since it is smaller than the sum of its proper divisors (81186112).

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

57266240 is a wasteful number, since it uses less digits than its factorization.

57266240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 57266240 is about 7567.4460685227. The cubic root of 57266240 is about 385.4483784896.

The spelling of 57266240 in words is "fifty-seven million, two hundred sixty-six thousand, two hundred forty".