72490277 has 4 divisors (see below), whose sum is σ = 72536940. Its totient is φ = 72443616.

The previous prime is 72490237. The next prime is 72490283. The reversal of 72490277 is 77209427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62948356 + 9541921 = 7934^2 + 3089^2 .

It is not a de Polignac number, because 72490277 - 2¹⁴ = 72473893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72490277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72490237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20918 + ... + 24135.

It is an arithmetic number, because the mean of its divisors is an integer number (18134235).

Almost surely, 2^72490277 is an apocalyptic number.

It is an amenable number.

72490277 is a deficient number, since it is larger than the sum of its proper divisors (46663).

72490277 is a wasteful number, since it uses less digits than its factorization.

72490277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46662.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 72490277 is about 8514.1222095998. The cubic root of 72490277 is about 416.9589046026.

The spelling of 72490277 in words is "seventy-two million, four hundred ninety thousand, two hundred seventy-seven".