28878875542 has 16 divisors (see below), whose sum is σ = 49743518400. Its totient is φ = 12435879240.

The previous prime is 28878875507. The next prime is 28878875581. The reversal of 28878875542 is 24557887882.

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, 34543692 + ... + 34544527.

It is an arithmetic number, because the mean of its divisors is an integer number (3108969900).

Almost surely, 2^28878875542 is an apocalyptic number.

28878875542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28878875542 is a deficient number, since it is larger than the sum of its proper divisors (20864642858).

28878875542 is a wasteful number, since it uses less digits than its factorization.

28878875542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69088251.

The product of its digits is 80281600, while the sum is 64.

The spelling of 28878875542 in words is "twenty-eight billion, eight hundred seventy-eight million, eight hundred seventy-five thousand, five hundred forty-two".