73991828 has 12 divisors (see below), whose sum is σ = 135115680. Its totient is φ = 35387352.

The previous prime is 73991809. The next prime is 73991831. The reversal of 73991828 is 82819937.

It is a super-2 number, since 2×73991828² = 10949581221563168, which contains 22 as substring.

It is a congruent number.

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, 402038 + ... + 402221.

It is an arithmetic number, because the mean of its divisors is an integer number (11259640).

Almost surely, 2^73991828 is an apocalyptic number.

It is an amenable number.

73991828 is a deficient number, since it is larger than the sum of its proper divisors (61123852).

73991828 is a wasteful number, since it uses less digits than its factorization.

73991828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804286 (or 804284 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 73991828 is about 8601.8502660765. The cubic root of 73991828 is about 419.8181903950.

The spelling of 73991828 in words is "seventy-three million, nine hundred ninety-one thousand, eight hundred twenty-eight".