26991420 has 48 divisors (see below), whose sum is σ = 78865920. Its totient is φ = 6884416.

The previous prime is 26991403. The next prime is 26991449. The reversal of 26991420 is 2419962.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8400 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (1643040).

Almost surely, 2^26991420 is an apocalyptic number.

26991420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26991420 is an abundant number, since it is smaller than the sum of its proper divisors (51874500).

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

26991420 is a wasteful number, since it uses less digits than its factorization.

26991420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594 (or 19592 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 26991420 is about 5195.3267462211. The cubic root of 26991420 is about 299.9682188555.

The spelling of 26991420 in words is "twenty-six million, nine hundred ninety-one thousand, four hundred twenty".