28797000078 has 64 divisors (see below), whose sum is σ = 71833932288. Its totient is φ = 7476779520.

The previous prime is 28797000041. The next prime is 28797000119. The reversal of 28797000078 is 87000079782.

28797000078 is a nontrivial binomial coefficient, being equal to C(239988, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1309026 + ... + 1330842.

It is an arithmetic number, because the mean of its divisors is an integer number (1122405192).

Almost surely, 2^28797000078 is an apocalyptic number.

28797000078 is the 239987-th triangular number and also the 119994-th hexagonal number.

28797000078 is an abundant number, since it is smaller than the sum of its proper divisors (43036932210).

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

28797000078 is a wasteful number, since it uses less digits than its factorization.

28797000078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24697.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 28797000078 in words is "twenty-eight billion, seven hundred ninety-seven million, seventy-eight", and thus it is an aban number.