28876009278 has 32 divisors (see below), whose sum is σ = 60963897600. Its totient is φ = 9092894976.

The previous prime is 28876009241. The next prime is 28876009291. The reversal of 28876009278 is 87290067882.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

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, 318538 + ... + 399021.

It is an arithmetic number, because the mean of its divisors is an integer number (1905121800).

Almost surely, 2^28876009278 is an apocalyptic number.

28876009278 is an abundant number, since it is smaller than the sum of its proper divisors (32087888322).

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

28876009278 is a wasteful number, since it uses less digits than its factorization.

28876009278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717936.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 28876009278 in words is "twenty-eight billion, eight hundred seventy-six million, nine thousand, two hundred seventy-eight".