26878140 has 36 divisors (see below), whose sum is σ = 81530904. Its totient is φ = 7167456.

The previous prime is 26878121. The next prime is 26878171. The reversal of 26878140 is 4187862.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 26878095 and 26878104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74482 + ... + 74841.

Almost surely, 2^26878140 is an apocalyptic number.

26878140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26878140 is an abundant number, since it is smaller than the sum of its proper divisors (54652764).

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

26878140 is a wasteful number, since it uses less digits than its factorization.

26878140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149338 (or 149333 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 26878140 is about 5184.4131779788. The cubic root of 26878140 is about 299.5479859531.

The spelling of 26878140 in words is "twenty-six million, eight hundred seventy-eight thousand, one hundred forty".