56623730 has 8 divisors (see below), whose sum is σ = 101922732. Its totient is φ = 22649488.

The previous prime is 56623729. The next prime is 56623739. The reversal of 56623730 is 3732665.

It can be written as a sum of positive squares in 2 ways, for example, as 45819361 + 10804369 = 6769^2 + 3287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×56623730² = 6412493598225800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56623739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2831177 + ... + 2831196.

Almost surely, 2^56623730 is an apocalyptic number.

56623730 is a deficient number, since it is larger than the sum of its proper divisors (45299002).

56623730 is a wasteful number, since it uses less digits than its factorization.

56623730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662380.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 56623730 is about 7524.8740853253. The cubic root of 56623730 is about 384.0014151062.

The spelling of 56623730 in words is "fifty-six million, six hundred twenty-three thousand, seven hundred thirty".