28020309376 has 32 divisors (see below), whose sum is σ = 55948978800. Its totient is φ = 13978212864.

The previous prime is 28020309371. The next prime is 28020309377. The reversal of 28020309376 is 67390302082.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28020309371) 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, 193135 + ... + 305518.

Almost surely, 2^28020309376 is an apocalyptic number.

It is an amenable number.

28020309376 is a deficient number, since it is larger than the sum of its proper divisors (27928669424).

28020309376 is an equidigital number, since it uses as much as digits as its factorization.

28020309376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499106 (or 499094 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 28020309376 in words is "twenty-eight billion, twenty million, three hundred nine thousand, three hundred seventy-six".