57420730 has 32 divisors (see below), whose sum is σ = 111519504. Its totient is φ = 21206016.

The previous prime is 57420689. The next prime is 57420731. The reversal of 57420730 is 3702475.

It can be written as a sum of positive squares in 8 ways, for example, as 48038761 + 9381969 = 6931^2 + 3063^2 .

It is not an unprimeable number, because it can be changed into a prime (57420731) 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, 5824 + ... + 12196.

Almost surely, 2^57420730 is an apocalyptic number.

57420730 is a deficient number, since it is larger than the sum of its proper divisors (54098774).

57420730 is a wasteful number, since it uses less digits than its factorization.

57420730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 57420730 is about 7577.6467323306. The cubic root of 57420730 is about 385.7946817196.

The spelling of 57420730 in words is "fifty-seven million, four hundred twenty thousand, seven hundred thirty".