28157492660 has 24 divisors (see below), whose sum is σ = 64506256416. Its totient is φ = 10239088160.

The previous prime is 28157492641. The next prime is 28157492669. The reversal of 28157492660 is 6629475182.

It is a junction number, because it is equal to n+sod(n) for n = 28157492599 and 28157492608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157492669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63994082 + ... + 63994521.

It is an arithmetic number, because the mean of its divisors is an integer number (2687760684).

Almost surely, 2^28157492660 is an apocalyptic number.

28157492660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28157492660 is an abundant number, since it is smaller than the sum of its proper divisors (36348763756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28157492660 is a wasteful number, since it uses less digits than its factorization.

28157492660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127988623 (or 127988621 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 28157492660 in words is "twenty-eight billion, one hundred fifty-seven million, four hundred ninety-two thousand, six hundred sixty".