73987290 has 128 divisors (see below), whose sum is σ = 215550720. Its totient is φ = 17950464.

The previous prime is 73987289. The next prime is 73987301. The reversal of 73987290 is 9278937.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 375472 + ... + 375668.

It is an arithmetic number, because the mean of its divisors is an integer number (1683990).

Almost surely, 2^73987290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73987290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107775360).

73987290 is an abundant number, since it is smaller than the sum of its proper divisors (141563430).

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

73987290 is a wasteful number, since it uses less digits than its factorization.

73987290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 73987290 is about 8601.5864815742. The cubic root of 73987290 is about 419.8096075828.

The spelling of 73987290 in words is "seventy-three million, nine hundred eighty-seven thousand, two hundred ninety".