73564380 has 36 divisors (see below), whose sum is σ = 223145832. Its totient is φ = 19617120.

The previous prime is 73564367. The next prime is 73564411. The reversal of 73564380 is 8346537.

It is a happy number.

73564380 is a `hidden beast` number, since 7 + 3 + 5 + 643 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204166 + ... + 204525.

Almost surely, 2^73564380 is an apocalyptic number.

It is an amenable number.

73564380 is an abundant number, since it is smaller than the sum of its proper divisors (149581452).

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

73564380 is a wasteful number, since it uses less digits than its factorization.

73564380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408706 (or 408701 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 73564380 is about 8576.9679957430. The cubic root of 73564380 is about 419.0082040153.

It can be divided in two parts, 73 and 564380, that added together give a triangular number (564453 = T₁₀₆₂).

The spelling of 73564380 in words is "seventy-three million, five hundred sixty-four thousand, three hundred eighty".