26172840 has 32 divisors (see below), whose sum is σ = 78518880. Its totient is φ = 6979392.

The previous prime is 26172833. The next prime is 26172851. The reversal of 26172840 is 4827162.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26172798 and 26172807.

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, 108934 + ... + 109173.

It is an arithmetic number, because the mean of its divisors is an integer number (2453715).

Almost surely, 2^26172840 is an apocalyptic number.

26172840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26172840 is an abundant number, since it is smaller than the sum of its proper divisors (52346040).

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

26172840 is a wasteful number, since it uses less digits than its factorization.

26172840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218121 (or 218117 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 26172840 is about 5115.9397963620. The cubic root of 26172840 is about 296.9046162882.

The spelling of 26172840 in words is "twenty-six million, one hundred seventy-two thousand, eight hundred forty".