73681624 has 8 divisors (see below), whose sum is σ = 138153060. Its totient is φ = 36840808.

The previous prime is 73681609. The next prime is 73681649. The reversal of 73681624 is 42618637.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4605094 + ... + 4605109.

Almost surely, 2^73681624 is an apocalyptic number.

It is an amenable number.

73681624 is a deficient number, since it is larger than the sum of its proper divisors (64471436).

73681624 is a wasteful number, since it uses less digits than its factorization.

73681624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9210209 (or 9210205 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 73681624 is about 8583.8000908688. The cubic root of 73681624 is about 419.2306854322.

It can be divided in two parts, 73681 and 624, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 73681624 in words is "seventy-three million, six hundred eighty-one thousand, six hundred twenty-four".