74890731 has 8 divisors (see below), whose sum is σ = 103297680. Its totient is φ = 48205472.

The previous prime is 74890721. The next prime is 74890733. The reversal of 74890731 is 13709847.

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

It is a cyclic number.

It is not a de Polignac number, because 74890731 - 2¹¹ = 74888683 is a prime.

It is a super-2 number, since 2×74890731² = 11217243179428722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74890731.

It is not an unprimeable number, because it can be changed into a prime (74890733) 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, 430320 + ... + 430493.

It is an arithmetic number, because the mean of its divisors is an integer number (12912210).

Almost surely, 2^74890731 is an apocalyptic number.

74890731 is a deficient number, since it is larger than the sum of its proper divisors (28406949).

74890731 is a wasteful number, since it uses less digits than its factorization.

74890731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860845.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 74890731 is about 8653.9430897135. The cubic root of 74890731 is about 421.5114307903.

The spelling of 74890731 in words is "seventy-four million, eight hundred ninety thousand, seven hundred thirty-one".