26399478 has 32 divisors (see below), whose sum is σ = 61076736. Its totient is φ = 7450848.

The previous prime is 26399467. The next prime is 26399543. The reversal of 26399478 is 87499362.

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, 301 + ... + 7272.

It is an arithmetic number, because the mean of its divisors is an integer number (1908648).

Almost surely, 2^26399478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26399478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30538368).

26399478 is an abundant number, since it is smaller than the sum of its proper divisors (34677258).

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

26399478 is a wasteful number, since it uses less digits than its factorization.

26399478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its digits is 653184, while the sum is 48.

The square root of 26399478 is about 5138.0422341588. The cubic root of 26399478 is about 297.7591480614.

The spelling of 26399478 in words is "twenty-six million, three hundred ninety-nine thousand, four hundred seventy-eight".