26989902720 has 192 divisors, whose sum is σ = 101672429040. Its totient is φ = 6542991360.

The previous prime is 26989902697. The next prime is 26989902767. The reversal of 26989902720 is 2720998962.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149629 + ... + 276348.

Almost surely, 2^26989902720 is an apocalyptic number.

26989902720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26989902720 is an abundant number, since it is smaller than the sum of its proper divisors (74682526320).

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

26989902720 is a wasteful number, since it uses less digits than its factorization.

26989902720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426013 (or 425998 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 26989902720 in words is "twenty-six billion, nine hundred eighty-nine million, nine hundred two thousand, seven hundred twenty".