27839490 has 64 divisors (see below), whose sum is σ = 78160896. Its totient is φ = 6213312.

The previous prime is 27839479. The next prime is 27839491. The reversal of 27839490 is 9493872.

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

It is not an unprimeable number, because it can be changed into a prime (27839491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7489 + ... + 10571.

It is an arithmetic number, because the mean of its divisors is an integer number (1221264).

Almost surely, 2^27839490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27839490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39080448).

27839490 is an abundant number, since it is smaller than the sum of its proper divisors (50321406).

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

27839490 is a wasteful number, since it uses less digits than its factorization.

27839490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 27839490 is about 5276.3140543376. The cubic root of 27839490 is about 303.0775433554.

The spelling of 27839490 in words is "twenty-seven million, eight hundred thirty-nine thousand, four hundred ninety".