74556690 has 64 divisors (see below), whose sum is σ = 196390656. Its totient is φ = 18001152.

The previous prime is 74556683. The next prime is 74556697. The reversal of 74556690 is 9665547.

It is an interprime number because it is at equal distance from previous prime (74556683) and next prime (74556697).

It is a super-2 number, since 2×74556690² = 11117400047512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74556697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18867 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (3068604).

Almost surely, 2^74556690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74556690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98195328).

74556690 is an abundant number, since it is smaller than the sum of its proper divisors (121833966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74556690 is a wasteful number, since it uses less digits than its factorization.

74556690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 74556690 is about 8634.6215898556. The cubic root of 74556690 is about 420.8837965387.

The spelling of 74556690 in words is "seventy-four million, five hundred fifty-six thousand, six hundred ninety".