26979540 has 48 divisors (see below), whose sum is σ = 86335872. Its totient is φ = 6166656.

The previous prime is 26979539. The next prime is 26979569. The reversal of 26979540 is 4597962.

It is a super-2 number, since 2×26979540² = 1455791157223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 26979492 and 26979501.

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, 31699 + ... + 32538.

It is an arithmetic number, because the mean of its divisors is an integer number (1798664).

Almost surely, 2^26979540 is an apocalyptic number.

26979540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26979540 is an abundant number, since it is smaller than the sum of its proper divisors (59356332).

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

26979540 is a wasteful number, since it uses less digits than its factorization.

26979540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64256 (or 64254 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 26979540 is about 5194.1832851758. The cubic root of 26979540 is about 299.9242030733.

The spelling of 26979540 in words is "twenty-six million, nine hundred seventy-nine thousand, five hundred forty".