26921380 has 24 divisors (see below), whose sum is σ = 57121848. Its totient is φ = 10656768.

The previous prime is 26921371. The next prime is 26921393. The reversal of 26921380 is 8312962.

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 26873856 = 218^2 + 5184^2 .

It is a super-2 number, since 2×26921380² = 1449521402208800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4999 + ... + 8878.

It is an arithmetic number, because the mean of its divisors is an integer number (2380077).

Almost surely, 2^26921380 is an apocalyptic number.

26921380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26921380 is an abundant number, since it is smaller than the sum of its proper divisors (30200468).

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

26921380 is a wasteful number, since it uses less digits than its factorization.

26921380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983 (or 13981 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 26921380 is about 5188.5816944518. The cubic root of 26921380 is about 299.7085317273.

The spelling of 26921380 in words is "twenty-six million, nine hundred twenty-one thousand, three hundred eighty".