27948409 has 8 divisors (see below), whose sum is σ = 29208960. Its totient is φ = 26715696.

The previous prime is 27948343. The next prime is 27948419. The reversal of 27948409 is 90484972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27948409 - 2⁷ = 27948281 is a prime.

It is a super-2 number, since 2×27948409² = 1562227131262562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27948419) 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, 4894 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (3651120).

Almost surely, 2^27948409 is an apocalyptic number.

It is an amenable number.

27948409 is a deficient number, since it is larger than the sum of its proper divisors (1260551).

27948409 is a wasteful number, since it uses less digits than its factorization.

27948409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13919.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 27948409 is about 5286.6254832360. The cubic root of 27948409 is about 303.4722817377.

The spelling of 27948409 in words is "twenty-seven million, nine hundred forty-eight thousand, four hundred nine".