57011440 has 40 divisors (see below), whose sum is σ = 133013808. Its totient is φ = 22725120.

The previous prime is 57011431. The next prime is 57011441. The reversal of 57011440 is 4411075.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57011441) 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, 25404 + ... + 27556.

Almost surely, 2^57011440 is an apocalyptic number.

It is an amenable number.

57011440 is an abundant number, since it is smaller than the sum of its proper divisors (76002368).

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

57011440 is a wasteful number, since it uses less digits than its factorization.

57011440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 57011440 is about 7550.5920297683. The cubic root of 57011440 is about 384.8758581030.

The spelling of 57011440 in words is "fifty-seven million, eleven thousand, four hundred forty".