28973077129920 has 896 divisors, whose sum is σ = 117638774323200. Its totient is φ = 5867026513920.

The previous prime is 28973077129847. The next prime is 28973077129979. The reversal of 28973077129920 is 2992177037982.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 583721424 + ... + 583771056.

Almost surely, 2^{28973077129920} is an apocalyptic number.

28973077129920 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 28973077129920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58819387161600).

28973077129920 is an abundant number, since it is smaller than the sum of its proper divisors (88665697193280).

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

28973077129920 is a wasteful number, since it uses less digits than its factorization.

28973077129920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49873 (or 49863 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 66.

The spelling of 28973077129920 in words is "twenty-eight trillion, nine hundred seventy-three billion, seventy-seven million, one hundred twenty-nine thousand, nine hundred twenty".