73504020 has 24 divisors (see below), whose sum is σ = 205811424. Its totient is φ = 19601056.

The previous prime is 73504019. The next prime is 73504051. The reversal of 73504020 is 2040537.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612474 + ... + 612593.

It is an arithmetic number, because the mean of its divisors is an integer number (8575476).

Almost surely, 2^73504020 is an apocalyptic number.

It is an amenable number.

73504020 is an abundant number, since it is smaller than the sum of its proper divisors (132307404).

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

73504020 is a wasteful number, since it uses less digits than its factorization.

73504020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225079 (or 1225077 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 73504020 is about 8573.4485476965. The cubic root of 73504020 is about 418.8935731048.

Adding to 73504020 its reverse (2040537), we get a palindrome (75544557).

The spelling of 73504020 in words is "seventy-three million, five hundred four thousand, twenty".