74378390 has 16 divisors (see below), whose sum is σ = 136995408. Its totient is φ = 29059296.

The previous prime is 74378377. The next prime is 74378401. The reversal of 74378390 is 9387347.

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 7 ways as a sum of consecutive naturals, for example, 86057 + ... + 86916.

It is an arithmetic number, because the mean of its divisors is an integer number (8562213).

Almost surely, 2^74378390 is an apocalyptic number.

74378390 is a deficient number, since it is larger than the sum of its proper divisors (62617018).

74378390 is a wasteful number, since it uses less digits than its factorization.

74378390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173023.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 74378390 is about 8624.2906954717. The cubic root of 74378390 is about 420.5480185690.

The spelling of 74378390 in words is "seventy-four million, three hundred seventy-eight thousand, three hundred ninety".