73491660 has 72 divisors (see below), whose sum is σ = 243197136. Its totient is φ = 17815680.

The previous prime is 73491659. The next prime is 73491667. The reversal of 73491660 is 6619437.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73491667) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 16579 + ... + 20538.

It is an arithmetic number, because the mean of its divisors is an integer number (3377738).

Almost surely, 2^73491660 is an apocalyptic number.

It is an amenable number.

73491660 is an abundant number, since it is smaller than the sum of its proper divisors (169705476).

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

73491660 is a wasteful number, since it uses less digits than its factorization.

73491660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37143 (or 37138 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 73491660 is about 8572.7276872650. The cubic root of 73491660 is about 418.8700922358.

It can be divided in two parts, 7349 and 1660, that added together give a palindrome (9009).

The spelling of 73491660 in words is "seventy-three million, four hundred ninety-one thousand, six hundred sixty".