57091400 has 24 divisors (see below), whose sum is σ = 132737970. Its totient is φ = 22836480.

The previous prime is 57091399. The next prime is 57091403. The reversal of 57091400 is 419075.

It can be written as a sum of positive squares in 3 ways, for example, as 46812964 + 10278436 = 6842^2 + 3206^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57091400.

It is not an unprimeable number, because it can be changed into a prime (57091403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142529 + ... + 142928.

Almost surely, 2^57091400 is an apocalyptic number.

57091400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

57091400 is an abundant number, since it is smaller than the sum of its proper divisors (75646570).

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

57091400 is a wasteful number, since it uses less digits than its factorization.

57091400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285473 (or 285464 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 57091400 is about 7555.8851235312. The cubic root of 57091400 is about 385.0557067872.

The spelling of 57091400 in words is "fifty-seven million, ninety-one thousand, four hundred".