26478680 has 32 divisors (see below), whose sum is σ = 61190640. Its totient is φ = 10304640.

The previous prime is 26478679. The next prime is 26478691. The reversal of 26478680 is 8687462.

It is a super-2 number, since 2×26478680² = 1402240989084800, which contains 22 as substring.

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, 7466 + ... + 10425.

Almost surely, 2^26478680 is an apocalyptic number.

26478680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26478680 is an abundant number, since it is smaller than the sum of its proper divisors (34711960).

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

26478680 is a wasteful number, since it uses less digits than its factorization.

26478680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17939 (or 17935 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 26478680 is about 5145.7438723668. The cubic root of 26478680 is about 298.0566233258.

The spelling of 26478680 in words is "twenty-six million, four hundred seventy-eight thousand, six hundred eighty".