57073730 has 48 divisors (see below), whose sum is σ = 120226680. Its totient is φ = 19450368.

The previous prime is 57073729. The next prime is 57073781. The reversal of 57073730 is 3737075.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19386409 + 37687321 = 4403^2 + 6139^2 .

It is a super-2 number, since 2×57073730² = 6514821312225800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131594 + ... + 132026.

Almost surely, 2^57073730 is an apocalyptic number.

57073730 is an abundant number, since it is smaller than the sum of its proper divisors (63152950).

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

57073730 is a wasteful number, since it uses less digits than its factorization.

57073730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 15435, while the sum is 32.

The square root of 57073730 is about 7554.7157458107. The cubic root of 57073730 is about 385.0159772984.

The spelling of 57073730 in words is "fifty-seven million, seventy-three thousand, seven hundred thirty".