28157139950 has 96 divisors (see below), whose sum is σ = 56356080480. Its totient is φ = 10465036800.

The previous prime is 28157139937. The next prime is 28157139961. The reversal of 28157139950 is 5993175182.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20388260 + ... + 20389640.

It is an arithmetic number, because the mean of its divisors is an integer number (587042505).

Almost surely, 2^28157139950 is an apocalyptic number.

28157139950 is an abundant number, since it is smaller than the sum of its proper divisors (28198940530).

28157139950 is a wasteful number, since it uses less digits than its factorization.

28157139950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 28157139950 in words is "twenty-eight billion, one hundred fifty-seven million, one hundred thirty-nine thousand, nine hundred fifty".