28764012501 has 48 divisors (see below), whose sum is σ = 49940167680. Its totient is φ = 15606190080.

The previous prime is 28764012457. The next prime is 28764012533. The reversal of 28764012501 is 10521046782.

28764012501 is a `hidden beast` number, since 2 + 8 + 7 + 640 + 1 + 2 + 5 + 0 + 1 = 666.

It is not a de Polignac number, because 28764012501 - 2⁷ = 28764012373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28764012001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35436 + ... + 242453.

It is an arithmetic number, because the mean of its divisors is an integer number (1040420160).

Almost surely, 2^28764012501 is an apocalyptic number.

28764012501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28764012501 is a deficient number, since it is larger than the sum of its proper divisors (21176155179).

28764012501 is a wasteful number, since it uses less digits than its factorization.

28764012501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277986 (or 277983 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 28764012501 in words is "twenty-eight billion, seven hundred sixty-four million, twelve thousand, five hundred one".