72790145 has 8 divisors (see below), whose sum is σ = 90360360. Its totient is φ = 56224000.

The previous prime is 72790127. The next prime is 72790181. The reversal of 72790145 is 54109727.

It can be written as a sum of positive squares in 4 ways, for example, as 13315201 + 59474944 = 3649^2 + 7712^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72790145 - 2¹⁴ = 72773761 is a prime.

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, 250856 + ... + 251145.

It is an arithmetic number, because the mean of its divisors is an integer number (11295045).

Almost surely, 2^72790145 is an apocalyptic number.

It is an amenable number.

72790145 is a deficient number, since it is larger than the sum of its proper divisors (17570215).

72790145 is a wasteful number, since it uses less digits than its factorization.

72790145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502035.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 72790145 is about 8531.7140716271. The cubic root of 72790145 is about 417.5330534267.

The spelling of 72790145 in words is "seventy-two million, seven hundred ninety thousand, one hundred forty-five".