26157980 has 24 divisors (see below), whose sum is σ = 55151712. Its totient is φ = 10421312.

The previous prime is 26157979. The next prime is 26157997. The reversal of 26157980 is 8975162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2774 + ... + 7746.

It is an arithmetic number, because the mean of its divisors is an integer number (2297988).

Almost surely, 2^26157980 is an apocalyptic number.

26157980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26157980 is an abundant number, since it is smaller than the sum of its proper divisors (28993732).

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

26157980 is a wasteful number, since it uses less digits than its factorization.

26157980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 26157980 is about 5114.4872665791. The cubic root of 26157980 is about 296.8484150525.

The spelling of 26157980 in words is "twenty-six million, one hundred fifty-seven thousand, nine hundred eighty".