26670440 has 32 divisors (see below), whose sum is σ = 60860160. Its totient is φ = 10516800.

The previous prime is 26670431. The next prime is 26670443. The reversal of 26670440 is 4407662.

It is a super-2 number, since 2×26670440² = 1422624739587200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26670443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 7535.

It is an arithmetic number, because the mean of its divisors is an integer number (1901880).

Almost surely, 2^26670440 is an apocalyptic number.

26670440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26670440 is an abundant number, since it is smaller than the sum of its proper divisors (34189720).

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

26670440 is a wasteful number, since it uses less digits than its factorization.

26670440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9473 (or 9469 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 26670440 is about 5164.3431334488. The cubic root of 26670440 is about 298.7744073008.

The spelling of 26670440 in words is "twenty-six million, six hundred seventy thousand, four hundred forty".