28154132128 has 12 divisors (see below), whose sum is σ = 55428447690. Its totient is φ = 14077066048.

The previous prime is 28154132099. The next prime is 28154132213. The reversal of 28154132128 is 82123145182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19417865104 + 8736267024 = 139348^2 + 93468^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439908283 + ... + 439908346.

Almost surely, 2^28154132128 is an apocalyptic number.

It is an amenable number.

28154132128 is a deficient number, since it is larger than the sum of its proper divisors (27274315562).

28154132128 is an equidigital number, since it uses as much as digits as its factorization.

28154132128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879816639 (or 879816631 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The spelling of 28154132128 in words is "twenty-eight billion, one hundred fifty-four million, one hundred thirty-two thousand, one hundred twenty-eight".