56072387 has 16 divisors (see below), whose sum is σ = 66223872. Its totient is φ = 46478880.

The previous prime is 56072381. The next prime is 56072407. The reversal of 56072387 is 78327065.

It is a happy number.

It is not a de Polignac number, because 56072387 - 2⁴ = 56072371 is a prime.

It is a super-2 number, since 2×56072387² = 6288225167755538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56072387.

It is not an unprimeable number, because it can be changed into a prime (56072381) 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, 31337 + ... + 33077.

It is an arithmetic number, because the mean of its divisors is an integer number (4138992).

Almost surely, 2^56072387 is an apocalyptic number.

56072387 is a deficient number, since it is larger than the sum of its proper divisors (10151485).

56072387 is a wasteful number, since it uses less digits than its factorization.

56072387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 56072387 is about 7488.1497714723. The cubic root of 56072387 is about 382.7510124217.

The spelling of 56072387 in words is "fifty-six million, seventy-two thousand, three hundred eighty-seven".