28912790278 has 8 divisors (see below), whose sum is σ = 43369971480. Its totient is φ = 14456133120.

The previous prime is 28912790201. The next prime is 28912790303. The reversal of 28912790278 is 87209721982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28912790278² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66438 + ... + 249478.

It is an arithmetic number, because the mean of its divisors is an integer number (5421246435).

Almost surely, 2^28912790278 is an apocalyptic number.

28912790278 is a deficient number, since it is larger than the sum of its proper divisors (14457181202).

28912790278 is a wasteful number, since it uses less digits than its factorization.

28912790278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262022.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 28912790278 in words is "twenty-eight billion, nine hundred twelve million, seven hundred ninety thousand, two hundred seventy-eight".