57072345 has 32 divisors (see below), whose sum is σ = 100531584. Its totient is φ = 27417600.

The previous prime is 57072317. The next prime is 57072359. The reversal of 57072345 is 54327075.

It is not a de Polignac number, because 57072345 - 2⁵ = 57072313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17115 + ... + 20175.

It is an arithmetic number, because the mean of its divisors is an integer number (3141612).

Almost surely, 2^57072345 is an apocalyptic number.

57072345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

57072345 is a deficient number, since it is larger than the sum of its proper divisors (43459239).

57072345 is a wasteful number, since it uses less digits than its factorization.

57072345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 57072345 is about 7554.6240806542. The cubic root of 57072345 is about 385.0128628974.

The spelling of 57072345 in words is "fifty-seven million, seventy-two thousand, three hundred forty-five".