28688674075402 has 12 divisors (see below), whose sum is σ = 47300747752818. Its totient is φ = 13040306397800.

The previous prime is 28688674075393. The next prime is 28688674075409. The reversal of 28688674075402 is 20457047688682.

It can be written as a sum of positive squares in only one way, i.e., 25554531412201 + 3134142663201 = 5055149^2 + 1770351^2 .

It is not an unprimeable number, because it can be changed into a prime (28688674075409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59274119749 + ... + 59274120232.

Almost surely, 2^{28688674075402} is an apocalyptic number.

28688674075402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28688674075402 is a deficient number, since it is larger than the sum of its proper divisors (18612073677416).

28688674075402 is a wasteful number, since it uses less digits than its factorization.

28688674075402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118548240005 (or 118548239994 counting only the distinct ones).

The product of its (nonzero) digits is 289013760, while the sum is 67.

The spelling of 28688674075402 in words is "twenty-eight trillion, six hundred eighty-eight billion, six hundred seventy-four million, seventy-five thousand, four hundred two".