57405090 has 32 divisors (see below), whose sum is σ = 145877760. Its totient is φ = 14407424.

The previous prime is 57405077. The next prime is 57405091. The reversal of 57405090 is 9050475.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (57405091) 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, 55770 + ... + 56789.

It is an arithmetic number, because the mean of its divisors is an integer number (4558680).

Almost surely, 2^57405090 is an apocalyptic number.

57405090 is an abundant number, since it is smaller than the sum of its proper divisors (88472670).

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

57405090 is a wasteful number, since it uses less digits than its factorization.

57405090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112586.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 57405090 is about 7576.6146793934. The cubic root of 57405090 is about 385.7596515326.

The spelling of 57405090 in words is "fifty-seven million, four hundred five thousand, ninety".