73280280 has 64 divisors (see below), whose sum is σ = 226944000. Its totient is φ = 18910080.

The previous prime is 73280279. The next prime is 73280281. The reversal of 73280280 is 8208237.

It is an interprime number because it is at equal distance from previous prime (73280279) and next prime (73280281).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73280281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6130 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (3546000).

Almost surely, 2^73280280 is an apocalyptic number.

It is an amenable number.

73280280 is an abundant number, since it is smaller than the sum of its proper divisors (153663720).

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

73280280 is a wasteful number, since it uses less digits than its factorization.

73280280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19744 (or 19740 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 73280280 is about 8560.3901780234. The cubic root of 73280280 is about 418.4681156292.

The spelling of 73280280 in words is "seventy-three million, two hundred eighty thousand, two hundred eighty".