28490477280 has 48 divisors (see below), whose sum is σ = 89745004944. Its totient is φ = 7597460480.

The previous prime is 28490477261. The next prime is 28490477291. The reversal of 28490477280 is 8277409482.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29677101 + ... + 29678060.

It is an arithmetic number, because the mean of its divisors is an integer number (1869687603).

Almost surely, 2^28490477280 is an apocalyptic number.

28490477280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28490477280 is an abundant number, since it is smaller than the sum of its proper divisors (61254527664).

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

28490477280 is a wasteful number, since it uses less digits than its factorization.

28490477280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59355179 (or 59355171 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 28490477280 in words is "twenty-eight billion, four hundred ninety million, four hundred seventy-seven thousand, two hundred eighty".