28704037551 has 32 divisors (see below), whose sum is σ = 44842997760. Its totient is φ = 15989962464.

The previous prime is 28704037547. The next prime is 28704037553. The reversal of 28704037551 is 15573040782.

It is not a de Polignac number, because 28704037551 - 2² = 28704037547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704037553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441880 + ... + 502658.

It is an arithmetic number, because the mean of its divisors is an integer number (1401343680).

Almost surely, 2^28704037551 is an apocalyptic number.

28704037551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28704037551 is a deficient number, since it is larger than the sum of its proper divisors (16138960209).

28704037551 is a wasteful number, since it uses less digits than its factorization.

28704037551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61355.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 28704037551 in words is "twenty-eight billion, seven hundred four million, thirty-seven thousand, five hundred fifty-one".