74720427 has 8 divisors (see below), whose sum is σ = 102320016. Its totient is φ = 48467232.

The previous prime is 74720419. The next prime is 74720449. The reversal of 74720427 is 72402747.

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

It is not a de Polignac number, because 74720427 - 2³ = 74720419 is a prime.

It is a super-2 number, since 2×74720427² = 11166284422124658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74720417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336468 + ... + 336689.

It is an arithmetic number, because the mean of its divisors is an integer number (12790002).

Almost surely, 2^74720427 is an apocalyptic number.

74720427 is a deficient number, since it is larger than the sum of its proper divisors (27599589).

74720427 is a wasteful number, since it uses less digits than its factorization.

74720427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673197.

The product of its (nonzero) digits is 21952, while the sum is 33.

The square root of 74720427 is about 8644.0978129589. The cubic root of 74720427 is about 421.1916779785.

The spelling of 74720427 in words is "seventy-four million, seven hundred twenty thousand, four hundred twenty-seven".