74821772 has 12 divisors (see below), whose sum is σ = 137829720. Its totient is φ = 35441856.

The previous prime is 74821759. The next prime is 74821787. The reversal of 74821772 is 27712847.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492173 + ... + 492324.

It is an arithmetic number, because the mean of its divisors is an integer number (11485810).

Almost surely, 2^74821772 is an apocalyptic number.

It is an amenable number.

74821772 is a deficient number, since it is larger than the sum of its proper divisors (63007948).

74821772 is a wasteful number, since it uses less digits than its factorization.

74821772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984520 (or 984518 counting only the distinct ones).

The product of its digits is 43904, while the sum is 38.

The square root of 74821772 is about 8649.9579189728. The cubic root of 74821772 is about 421.3820158747.

The spelling of 74821772 in words is "seventy-four million, eight hundred twenty-one thousand, seven hundred seventy-two".