73990881 has 8 divisors (see below), whose sum is σ = 109616160. Its totient is φ = 49327236.

The previous prime is 73990837. The next prime is 73990901. The reversal of 73990881 is 18809937.

It is not a de Polignac number, because 73990881 - 2⁹ = 73990369 is a prime.

It is a super-2 number, since 2×73990881² = 10949300942312322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73990801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370175 + ... + 1370228.

It is an arithmetic number, because the mean of its divisors is an integer number (13702020).

Almost surely, 2^73990881 is an apocalyptic number.

It is an amenable number.

73990881 is a deficient number, since it is larger than the sum of its proper divisors (35625279).

73990881 is a wasteful number, since it uses less digits than its factorization.

73990881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740412 (or 2740406 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 73990881 is about 8601.7952196039. The cubic root of 73990881 is about 419.8163993435.

The spelling of 73990881 in words is "seventy-three million, nine hundred ninety thousand, eight hundred eighty-one".