72880557 has 8 divisors (see below), whose sum is σ = 98345184. Its totient is φ = 48001488.

The previous prime is 72880553. The next prime is 72880559. The reversal of 72880557 is 75508827.

It is a happy number.

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

It is not a de Polignac number, because 72880557 - 2² = 72880553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72880553) 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 7 ways as a sum of consecutive naturals, for example, 146098 + ... + 146595.

It is an arithmetic number, because the mean of its divisors is an integer number (12293148).

Almost surely, 2^72880557 is an apocalyptic number.

It is an amenable number.

72880557 is a deficient number, since it is larger than the sum of its proper divisors (25464627).

72880557 is a wasteful number, since it uses less digits than its factorization.

72880557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292779.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 72880557 is about 8537.0110108867. The cubic root of 72880557 is about 417.7058532819.

It can be divided in two parts, 72880 and 557, that added together give a palindrome (73437).

The spelling of 72880557 in words is "seventy-two million, eight hundred eighty thousand, five hundred fifty-seven".