28051899402 has 16 divisors (see below), whose sum is σ = 59056630560. Its totient is φ = 8858494512.

The previous prime is 28051899367. The next prime is 28051899431. The reversal of 28051899402 is 20499815082.

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, 123034533 + ... + 123034760.

It is an arithmetic number, because the mean of its divisors is an integer number (3691039410).

Almost surely, 2^28051899402 is an apocalyptic number.

28051899402 is an abundant number, since it is smaller than the sum of its proper divisors (31004731158).

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

28051899402 is a wasteful number, since it uses less digits than its factorization.

28051899402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246069317.

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 28051899402 in words is "twenty-eight billion, fifty-one million, eight hundred ninety-nine thousand, four hundred two".