74405390 has 8 divisors (see below), whose sum is σ = 133929720. Its totient is φ = 29762152.

The previous prime is 74405381. The next prime is 74405393. The reversal of 74405390 is 9350447.

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

It is a super-2 number, since 2×74405390² = 11072324122104200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74405393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3720260 + ... + 3720279.

It is an arithmetic number, because the mean of its divisors is an integer number (16741215).

Almost surely, 2^74405390 is an apocalyptic number.

74405390 is a deficient number, since it is larger than the sum of its proper divisors (59524330).

74405390 is a wasteful number, since it uses less digits than its factorization.

74405390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7440546.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 74405390 is about 8625.8558995615. The cubic root of 74405390 is about 420.5988999376.

The spelling of 74405390 in words is "seventy-four million, four hundred five thousand, three hundred ninety".