74633690 has 16 divisors (see below), whose sum is σ = 134477928. Its totient is φ = 29822976.

The previous prime is 74633659. The next prime is 74633693. The reversal of 74633690 is 9633647.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58721569 + 15912121 = 7663^2 + 3989^2 .

It is a super-2 number, since 2×74633690² = 11140375366032200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74633693) 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, 8294 + ... + 14766.

Almost surely, 2^74633690 is an apocalyptic number.

74633690 is a deficient number, since it is larger than the sum of its proper divisors (59844238).

74633690 is a wasteful number, since it uses less digits than its factorization.

74633690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 74633690 is about 8639.0792333443. The cubic root of 74633690 is about 421.0286389042.

The spelling of 74633690 in words is "seventy-four million, six hundred thirty-three thousand, six hundred ninety".