28157858402 has 8 divisors (see below), whose sum is σ = 42358508496. Its totient is φ = 14038355572.

The previous prime is 28157858389. The next prime is 28157858441. The reversal of 28157858402 is 20485875182.

28157858402 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20285948 + ... + 20287335.

It is an arithmetic number, because the mean of its divisors is an integer number (5294813562).

Almost surely, 2^28157858402 is an apocalyptic number.

28157858402 is a deficient number, since it is larger than the sum of its proper divisors (14200650094).

28157858402 is a wasteful number, since it uses less digits than its factorization.

28157858402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40573632.

The product of its (nonzero) digits is 1433600, while the sum is 50.

The spelling of 28157858402 in words is "twenty-eight billion, one hundred fifty-seven million, eight hundred fifty-eight thousand, four hundred two".