73809540 has 72 divisors (see below), whose sum is σ = 255877440. Its totient is φ = 16870464.

The previous prime is 73809517. The next prime is 73809551. The reversal of 73809540 is 4590837.

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

It is a junction number, because it is equal to n+sod(n) for n = 73809495 and 73809504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28030 + ... + 30549.

Almost surely, 2^73809540 is an apocalyptic number.

73809540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73809540 is an abundant number, since it is smaller than the sum of its proper divisors (182067900).

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

73809540 is a wasteful number, since it uses less digits than its factorization.

73809540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58601 (or 58596 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 73809540 is about 8591.2478721080. The cubic root of 73809540 is about 419.4731489143.

The spelling of 73809540 in words is "seventy-three million, eight hundred nine thousand, five hundred forty".