28379317644 has 36 divisors (see below), whose sum is σ = 71834542416. Its totient is φ = 9446858208.

The previous prime is 28379317627. The next prime is 28379317649. The reversal of 28379317644 is 44671397382.

28379317644 is a `hidden beast` number, since 283 + 7 + 9 + 317 + 6 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28379317649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511344 + ... + 564119.

It is an arithmetic number, because the mean of its divisors is an integer number (1995403956).

Almost surely, 2^28379317644 is an apocalyptic number.

It is an amenable number.

28379317644 is an abundant number, since it is smaller than the sum of its proper divisors (43455224772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28379317644 is a wasteful number, since it uses less digits than its factorization.

28379317644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076206 (or 1076201 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The spelling of 28379317644 in words is "twenty-eight billion, three hundred seventy-nine million, three hundred seventeen thousand, six hundred forty-four".