28152278402 has 4 divisors (see below), whose sum is σ = 42228417606. Its totient is φ = 14076139200.

The previous prime is 28152278327. The next prime is 28152278419. The reversal of 28152278402 is 20487225182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17878631521 + 10273646881 = 133711^2 + 101359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28152278402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7038069599 + ... + 7038069602.

Almost surely, 2^28152278402 is an apocalyptic number.

28152278402 is a deficient number, since it is larger than the sum of its proper divisors (14076139204).

28152278402 is a wasteful number, since it uses less digits than its factorization.

28152278402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14076139203.

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 28152278402 in words is "twenty-eight billion, one hundred fifty-two million, two hundred seventy-eight thousand, four hundred two".