74091390 has 32 divisors (see below), whose sum is σ = 182628000. Its totient is φ = 19223424.

The previous prime is 74091377. The next prime is 74091439. The reversal of 74091390 is 9319047.

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, 32265 + ... + 34484.

It is an arithmetic number, because the mean of its divisors is an integer number (5707125).

Almost surely, 2^74091390 is an apocalyptic number.

74091390 is an abundant number, since it is smaller than the sum of its proper divisors (108536610).

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

74091390 is a wasteful number, since it uses less digits than its factorization.

74091390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66796.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 74091390 is about 8607.6355638468. The cubic root of 74091390 is about 420.0064057980.

The spelling of 74091390 in words is "seventy-four million, ninety-one thousand, three hundred ninety".