74945390 has 32 divisors (see below), whose sum is σ = 146059200. Its totient is φ = 27523584.

The previous prime is 74945371. The next prime is 74945419. The reversal of 74945390 is 9354947.

It is a super-2 number, since 2×74945390² = 11233622964504200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24422 + ... + 27318.

It is an arithmetic number, because the mean of its divisors is an integer number (4564350).

Almost surely, 2^74945390 is an apocalyptic number.

74945390 is a deficient number, since it is larger than the sum of its proper divisors (71113810).

74945390 is a wasteful number, since it uses less digits than its factorization.

74945390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 74945390 is about 8657.1005538806. The cubic root of 74945390 is about 421.6139525584.

The spelling of 74945390 in words is "seventy-four million, nine hundred forty-five thousand, three hundred ninety".