28988437968 has 60 divisors (see below), whose sum is σ = 92716991328. Its totient is φ = 8282410560.

The previous prime is 28988437943. The next prime is 28988437979. The reversal of 28988437968 is 86973488982.

28988437968 is a `hidden beast` number, since 28 + 9 + 88 + 437 + 96 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28988437896 and 28988437905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14378178 + ... + 14380193.

Almost surely, 2^28988437968 is an apocalyptic number.

28988437968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28988437968 is an abundant number, since it is smaller than the sum of its proper divisors (63728553360).

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

28988437968 is a wasteful number, since it uses less digits than its factorization.

28988437968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28758392 (or 28758383 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 28988437968 in words is "twenty-eight billion, nine hundred eighty-eight million, four hundred thirty-seven thousand, nine hundred sixty-eight".