28690378196 has 12 divisors (see below), whose sum is σ = 50231410740. Its totient is φ = 14338546560.

The previous prime is 28690378193. The next prime is 28690378207. The reversal of 28690378196 is 69187309682.

It can be written as a sum of positive squares in 2 ways, for example, as 8932140100 + 19758238096 = 94510^2 + 140564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690378193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650911 + ... + 1668198.

It is an arithmetic number, because the mean of its divisors is an integer number (4185950895).

Almost surely, 2^28690378196 is an apocalyptic number.

It is an amenable number.

28690378196 is a deficient number, since it is larger than the sum of its proper divisors (21541032544).

28690378196 is a wasteful number, since it uses less digits than its factorization.

28690378196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321274 (or 3321272 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 28690378196 in words is "twenty-eight billion, six hundred ninety million, three hundred seventy-eight thousand, one hundred ninety-six".