28478088940 has 48 divisors (see below), whose sum is σ = 71319048192. Its totient is φ = 9339397056.

The previous prime is 28478088931. The next prime is 28478088959. The reversal of 28478088940 is 4988087482.

It is a super-2 number, since 2×28478088940² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4418844 + ... + 4425283.

It is an arithmetic number, because the mean of its divisors is an integer number (1485813504).

Almost surely, 2^28478088940 is an apocalyptic number.

28478088940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28478088940 is an abundant number, since it is smaller than the sum of its proper divisors (42840959252).

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

28478088940 is a wasteful number, since it uses less digits than its factorization.

28478088940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8844166 (or 8844164 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 58.

The spelling of 28478088940 in words is "twenty-eight billion, four hundred seventy-eight million, eighty-eight thousand, nine hundred forty".