28278161526 has 8 divisors (see below), whose sum is σ = 56556323064. Its totient is φ = 9426053840.

The previous prime is 28278161519. The next prime is 28278161557. The reversal of 28278161526 is 62516187282.

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

28278161526 is an admirable number.

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, 2356513455 + ... + 2356513466.

It is an arithmetic number, because the mean of its divisors is an integer number (7069540383).

Almost surely, 2^28278161526 is an apocalyptic number.

28278161526 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28278161526 is a wasteful number, since it uses less digits than its factorization.

28278161526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713026926.

The product of its digits is 645120, while the sum is 48.

The spelling of 28278161526 in words is "twenty-eight billion, two hundred seventy-eight million, one hundred sixty-one thousand, five hundred twenty-six".