28178993260 has 48 divisors (see below), whose sum is σ = 67362285312. Its totient is φ = 9801387200.

The previous prime is 28178993257. The next prime is 28178993287. The reversal of 28178993260 is 6239987182.

It is a super-2 number, since 2×28178993260² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2779426 + ... + 2789545.

It is an arithmetic number, because the mean of its divisors is an integer number (1403380944).

Almost surely, 2^28178993260 is an apocalyptic number.

28178993260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28178993260 is an abundant number, since it is smaller than the sum of its proper divisors (39183292052).

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

28178993260 is a wasteful number, since it uses less digits than its factorization.

28178993260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5569014 (or 5569012 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 28178993260 in words is "twenty-eight billion, one hundred seventy-eight million, nine hundred ninety-three thousand, two hundred sixty".