26139380 has 24 divisors (see below), whose sum is σ = 55714848. Its totient is φ = 10299168.

The previous prime is 26139371. The next prime is 26139397. The reversal of 26139380 is 8393162.

It is a congruent number.

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, 8414 + ... + 11093.

It is an arithmetic number, because the mean of its divisors is an integer number (2321452).

Almost surely, 2^26139380 is an apocalyptic number.

26139380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26139380 is an abundant number, since it is smaller than the sum of its proper divisors (29575468).

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

26139380 is a wasteful number, since it uses less digits than its factorization.

26139380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19583 (or 19581 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 26139380 is about 5112.6685791277. The cubic root of 26139380 is about 296.7780389541.

The spelling of 26139380 in words is "twenty-six million, one hundred thirty-nine thousand, three hundred eighty".