73781868 has 12 divisors (see below), whose sum is σ = 172157720. Its totient is φ = 24593952.

The previous prime is 73781867. The next prime is 73781893. The reversal of 73781868 is 86818737.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (73781863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074233 + ... + 3074256.

Almost surely, 2^73781868 is an apocalyptic number.

It is an amenable number.

73781868 is an abundant number, since it is smaller than the sum of its proper divisors (98375852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73781868 is a wasteful number, since it uses less digits than its factorization.

73781868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148496 (or 6148494 counting only the distinct ones).

The product of its digits is 451584, while the sum is 48.

The square root of 73781868 is about 8589.6372449598. The cubic root of 73781868 is about 419.4207206785.

The spelling of 73781868 in words is "seventy-three million, seven hundred eighty-one thousand, eight hundred sixty-eight".