73456640 has 44 divisors (see below), whose sum is σ = 176222136. Its totient is φ = 29380608.

The previous prime is 73456631. The next prime is 73456651. The reversal of 73456640 is 4665437.

It is a self number, because there is not a number n which added to its sum of digits gives 73456640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2054 + ... + 12293.

Almost surely, 2^73456640 is an apocalyptic number.

It is an amenable number.

73456640 is an abundant number, since it is smaller than the sum of its proper divisors (102765496).

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

73456640 is a wasteful number, since it uses less digits than its factorization.

73456640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14372 (or 14354 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 73456640 is about 8570.6849201216. The cubic root of 73456640 is about 418.8035488066.

The spelling of 73456640 in words is "seventy-three million, four hundred fifty-six thousand, six hundred forty".