28204137678 has 8 divisors (see below), whose sum is σ = 56408275368. Its totient is φ = 9401379224.

The previous prime is 28204137653. The next prime is 28204137727. The reversal of 28204137678 is 87673140282.

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

28204137678 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, 2350344801 + ... + 2350344812.

It is an arithmetic number, because the mean of its divisors is an integer number (7051034421).

Almost surely, 2^28204137678 is an apocalyptic number.

28204137678 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.

28204137678 is a wasteful number, since it uses less digits than its factorization.

28204137678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700689618.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 28204137678 in words is "twenty-eight billion, two hundred four million, one hundred thirty-seven thousand, six hundred seventy-eight".