73577540 has 12 divisors (see below), whose sum is σ = 154512876. Its totient is φ = 29431008.

The previous prime is 73577527. The next prime is 73577549. The reversal of 73577540 is 4577537.

It can be written as a sum of positive squares in 2 ways, for example, as 52765696 + 20811844 = 7264^2 + 4562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 73577494 and 73577503.

It is not an unprimeable number, because it can be changed into a prime (73577549) 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, 1839419 + ... + 1839458.

It is an arithmetic number, because the mean of its divisors is an integer number (12876073).

Almost surely, 2^73577540 is an apocalyptic number.

It is an amenable number.

73577540 is an abundant number, since it is smaller than the sum of its proper divisors (80935336).

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

73577540 is a wasteful number, since it uses less digits than its factorization.

73577540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678886 (or 3678884 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 38.

The square root of 73577540 is about 8577.7351323062. The cubic root of 73577540 is about 419.0331881140.

The spelling of 73577540 in words is "seventy-three million, five hundred seventy-seven thousand, five hundred forty".