26749980 has 48 divisors (see below), whose sum is σ = 83223840. Its totient is φ = 7133184.

The previous prime is 26749979. The next prime is 26749991. The reversal of 26749980 is 8994762.

It is a happy number.

It is a super-2 number, since 2×26749980² = 1431122860000800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 24229 + ... + 25308.

It is an arithmetic number, because the mean of its divisors is an integer number (1733830).

Almost surely, 2^26749980 is an apocalyptic number.

26749980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26749980 is an abundant number, since it is smaller than the sum of its proper divisors (56473860).

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

26749980 is a wasteful number, since it uses less digits than its factorization.

26749980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49555 (or 49547 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 26749980 is about 5172.0382829210. The cubic root of 26749980 is about 299.0711269511.

The spelling of 26749980 in words is "twenty-six million, seven hundred forty-nine thousand, nine hundred eighty".