28032241557 has 32 divisors (see below), whose sum is σ = 38362035712. Its totient is φ = 18202558464.

The previous prime is 28032241481. The next prime is 28032241571. The reversal of 28032241557 is 75514223082.

It is not a de Polignac number, because 28032241557 - 2¹¹ = 28032239509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032241597) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12256068 + ... + 12258354.

It is an arithmetic number, because the mean of its divisors is an integer number (1198813616).

Almost surely, 2^28032241557 is an apocalyptic number.

It is an amenable number.

28032241557 is a deficient number, since it is larger than the sum of its proper divisors (10329794155).

28032241557 is a wasteful number, since it uses less digits than its factorization.

28032241557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 28032241557 in words is "twenty-eight billion, thirty-two million, two hundred forty-one thousand, five hundred fifty-seven".