57775440 has 80 divisors (see below), whose sum is σ = 181827648. Its totient is φ = 15172608.

The previous prime is 57775433. The next prime is 57775441. The reversal of 57775440 is 4457775.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57775441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14284 + ... + 17876.

Almost surely, 2^57775440 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 57775440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90913824).

57775440 is an abundant number, since it is smaller than the sum of its proper divisors (124052208).

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

57775440 is a wasteful number, since it uses less digits than its factorization.

57775440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676 (or 3670 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 57775440 is about 7601.0157215993. The cubic root of 57775440 is about 386.5874523949.

The spelling of 57775440 in words is "fifty-seven million, seven hundred seventy-five thousand, four hundred forty".