28040180157 has 32 divisors (see below), whose sum is σ = 45382446720. Its totient is φ = 16969680000.

The previous prime is 28040180143. The next prime is 28040180167. The reversal of 28040180157 is 75108104082.

28040180157 is a `hidden beast` number, since 28 + 0 + 401 + 80 + 157 = 666.

It is not a de Polignac number, because 28040180157 - 2⁶ = 28040180093 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28040180167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140857 + ... + 275537.

It is an arithmetic number, because the mean of its divisors is an integer number (1418201460).

Almost surely, 2^28040180157 is an apocalyptic number.

28040180157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28040180157 is a deficient number, since it is larger than the sum of its proper divisors (17342266563).

28040180157 is a wasteful number, since it uses less digits than its factorization.

28040180157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135402 (or 135396 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 28040180157 in words is "twenty-eight billion, forty million, one hundred eighty thousand, one hundred fifty-seven".