28402453802 has 4 divisors (see below), whose sum is σ = 42603680706. Its totient is φ = 14201226900.

The previous prime is 28402453801. The next prime is 28402453847. The reversal of 28402453802 is 20835420482.

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., 28026442921 + 376010881 = 167411^2 + 19391^2 .

It is not an unprimeable number, because it can be changed into a prime (28402453801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7100613449 + ... + 7100613452.

Almost surely, 2^28402453802 is an apocalyptic number.

28402453802 is a deficient number, since it is larger than the sum of its proper divisors (14201226904).

28402453802 is a wasteful number, since it uses less digits than its factorization.

28402453802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14201226903.

The product of its (nonzero) digits is 122880, while the sum is 38.

The spelling of 28402453802 in words is "twenty-eight billion, four hundred two million, four hundred fifty-three thousand, eight hundred two".