73899220 has 24 divisors (see below), whose sum is σ = 158975208. Its totient is φ = 28838400.

The previous prime is 73899197. The next prime is 73899233. The reversal of 73899220 is 2299837.

It can be written as a sum of positive squares in 4 ways, for example, as 10982596 + 62916624 = 3314^2 + 7932^2 .

It is a super-2 number, since 2×73899220² = 10922189433216800, which contains 22 as substring.

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, 44241 + ... + 45880.

It is an arithmetic number, because the mean of its divisors is an integer number (6623967).

Almost surely, 2^73899220 is an apocalyptic number.

It is an amenable number.

73899220 is an abundant number, since it is smaller than the sum of its proper divisors (85075988).

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

73899220 is a wasteful number, since it uses less digits than its factorization.

73899220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90171 (or 90169 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 73899220 is about 8596.4655527723. The cubic root of 73899220 is about 419.6429694488.

The spelling of 73899220 in words is "seventy-three million, eight hundred ninety-nine thousand, two hundred twenty".