28723746488 has 8 divisors (see below), whose sum is σ = 53857024680. Its totient is φ = 14361873240.

The previous prime is 28723746479. The next prime is 28723746497. The reversal of 28723746488 is 88464732782.

It is an interprime number because it is at equal distance from previous prime (28723746479) and next prime (28723746497).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28723746488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1795234148 + ... + 1795234163.

It is an arithmetic number, because the mean of its divisors is an integer number (6732128085).

Almost surely, 2^28723746488 is an apocalyptic number.

It is an amenable number.

28723746488 is a deficient number, since it is larger than the sum of its proper divisors (25133278192).

28723746488 is a wasteful number, since it uses less digits than its factorization.

28723746488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590468317 (or 3590468313 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 59.

The spelling of 28723746488 in words is "twenty-eight billion, seven hundred twenty-three million, seven hundred forty-six thousand, four hundred eighty-eight".