28202990157 has 32 divisors (see below), whose sum is σ = 46568419200. Its totient is φ = 16764620544.

The previous prime is 28202990143. The next prime is 28202990171. The reversal of 28202990157 is 75109920282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28202990143) and next prime (28202990171).

It is not a de Polignac number, because 28202990157 - 2¹¹ = 28202988109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28202990107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1608238 + ... + 1625679.

It is an arithmetic number, because the mean of its divisors is an integer number (1455263100).

Almost surely, 2^28202990157 is an apocalyptic number.

28202990157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28202990157 is a deficient number, since it is larger than the sum of its proper divisors (18365429043).

28202990157 is a wasteful number, since it uses less digits than its factorization.

28202990157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233962 (or 3233956 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 28202990157 in words is "twenty-eight billion, two hundred two million, nine hundred ninety thousand, one hundred fifty-seven".