26138990 has 8 divisors (see below), whose sum is σ = 47050200. Its totient is φ = 10455592.

The previous prime is 26138951. The next prime is 26138993. The reversal of 26138990 is 9983162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26138993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306940 + ... + 1306959.

It is an arithmetic number, because the mean of its divisors is an integer number (5881275).

Almost surely, 2^26138990 is an apocalyptic number.

26138990 is a deficient number, since it is larger than the sum of its proper divisors (20911210).

26138990 is a wasteful number, since it uses less digits than its factorization.

26138990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613906.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 26138990 is about 5112.6304384338. The cubic root of 26138990 is about 296.7765629689.

The spelling of 26138990 in words is "twenty-six million, one hundred thirty-eight thousand, nine hundred ninety".