74274644 has 12 divisors (see below), whose sum is σ = 130097268. Its totient is φ = 37104000.

The previous prime is 74274643. The next prime is 74274679. The reversal of 74274644 is 44647247.

It can be written as a sum of positive squares in 2 ways, for example, as 4752400 + 69522244 = 2180^2 + 8338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74274598 and 74274607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74274643) 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, 2927 + ... + 12534.

It is an arithmetic number, because the mean of its divisors is an integer number (10841439).

Almost surely, 2^74274644 is an apocalyptic number.

It is an amenable number.

74274644 is a deficient number, since it is larger than the sum of its proper divisors (55822624).

74274644 is a wasteful number, since it uses less digits than its factorization.

74274644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666 (or 16664 counting only the distinct ones).

The product of its digits is 150528, while the sum is 38.

The square root of 74274644 is about 8618.2738410891. The cubic root of 74274644 is about 420.3523950993.

The spelling of 74274644 in words is "seventy-four million, two hundred seventy-four thousand, six hundred forty-four".