28696309020 has 120 divisors (see below), whose sum is σ = 90096907824. Its totient is φ = 7645929984.

The previous prime is 28696309001. The next prime is 28696309039. The reversal of 28696309020 is 2090369682.

28696309020 is a `hidden beast` number, since 2 + 8 + 6 + 9 + 630 + 9 + 0 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28696309001) and next prime (28696309039).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2110564 + ... + 2124116.

Almost surely, 2^28696309020 is an apocalyptic number.

28696309020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28696309020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45048453912).

28696309020 is an abundant number, since it is smaller than the sum of its proper divisors (61400598804).

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

28696309020 is a wasteful number, since it uses less digits than its factorization.

28696309020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14881 (or 14870 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 28696309020 in words is "twenty-eight billion, six hundred ninety-six million, three hundred nine thousand, twenty".