26690380 has 24 divisors (see below), whose sum is σ = 57859200. Its totient is φ = 10331520.

The previous prime is 26690371. The next prime is 26690381. The reversal of 26690380 is 8309662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26690381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20905 + ... + 22144.

It is an arithmetic number, because the mean of its divisors is an integer number (2410800).

Almost surely, 2^26690380 is an apocalyptic number.

26690380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26690380 is an abundant number, since it is smaller than the sum of its proper divisors (31168820).

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

26690380 is a wasteful number, since it uses less digits than its factorization.

26690380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43089 (or 43087 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 26690380 is about 5166.2733183602. The cubic root of 26690380 is about 298.8488477373.

The spelling of 26690380 in words is "twenty-six million, six hundred ninety thousand, three hundred eighty".