28390127580 has 72 divisors (see below), whose sum is σ = 86130665712. Its totient is φ = 7569474816.

The previous prime is 28390127531. The next prime is 28390127603. The reversal of 28390127580 is 8572109382.

It is a happy number.

28390127580 is a `hidden beast` number, since 28 + 39 + 0 + 12 + 7 + 580 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1874719 + ... + 1889801.

It is an arithmetic number, because the mean of its divisors is an integer number (1196259246).

Almost surely, 2^28390127580 is an apocalyptic number.

28390127580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28390127580 is an abundant number, since it is smaller than the sum of its proper divisors (57740538132).

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

28390127580 is a wasteful number, since it uses less digits than its factorization.

28390127580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555 (or 25550 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 28390127580 in words is "twenty-eight billion, three hundred ninety million, one hundred twenty-seven thousand, five hundred eighty".