56728371 has 32 divisors (see below), whose sum is σ = 92302848. Its totient is φ = 30251520.

The previous prime is 56728369. The next prime is 56728387. The reversal of 56728371 is 17382765.

It is not a de Polignac number, because 56728371 - 2¹ = 56728369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56728351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46161 + ... + 47373.

It is an arithmetic number, because the mean of its divisors is an integer number (2884464).

Almost surely, 2^56728371 is an apocalyptic number.

56728371 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56728371 is a deficient number, since it is larger than the sum of its proper divisors (35574477).

56728371 is a wasteful number, since it uses less digits than its factorization.

56728371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371.

The product of its digits is 70560, while the sum is 39.

The square root of 56728371 is about 7531.8238826993. The cubic root of 56728371 is about 384.2378151990.

The spelling of 56728371 in words is "fifty-six million, seven hundred twenty-eight thousand, three hundred seventy-one".