28309292138976 has 24 divisors (see below), whose sum is σ = 74311891865064. Its totient is φ = 9436430712960.

The previous prime is 28309292138969. The next prime is 28309292138989. The reversal of 28309292138976 is 67983129290382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28309292138976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147444229795 + ... + 147444229986.

It is an arithmetic number, because the mean of its divisors is an integer number (3096328827711).

Almost surely, 2^{28309292138976} is an apocalyptic number.

It is an amenable number.

28309292138976 is an abundant number, since it is smaller than the sum of its proper divisors (46002599726088).

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

28309292138976 is a wasteful number, since it uses less digits than its factorization.

28309292138976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294888459794 (or 294888459786 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 69.

The spelling of 28309292138976 in words is "twenty-eight trillion, three hundred nine billion, two hundred ninety-two million, one hundred thirty-eight thousand, nine hundred seventy-six".