73474640 has 20 divisors (see below), whose sum is σ = 170828724. Its totient is φ = 29389824.

The previous prime is 73474613. The next prime is 73474649. The reversal of 73474640 is 4647437.

It can be written as a sum of positive squares in 2 ways, for example, as 8317456 + 65157184 = 2884^2 + 8072^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 73474640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73474649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459137 + ... + 459296.

Almost surely, 2^73474640 is an apocalyptic number.

It is an amenable number.

73474640 is an abundant number, since it is smaller than the sum of its proper divisors (97354084).

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

73474640 is a wasteful number, since it uses less digits than its factorization.

73474640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918446 (or 918440 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 35.

The square root of 73474640 is about 8571.7349469054. The cubic root of 73474640 is about 418.8377542381.

The spelling of 73474640 in words is "seventy-three million, four hundred seventy-four thousand, six hundred forty".