27690420 has 24 divisors (see below), whose sum is σ = 77533344. Its totient is φ = 7384096.

The previous prime is 27690373. The next prime is 27690427. The reversal of 27690420 is 2409672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27690427) 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, 230694 + ... + 230813.

It is an arithmetic number, because the mean of its divisors is an integer number (3230556).

Almost surely, 2^27690420 is an apocalyptic number.

27690420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27690420 is an abundant number, since it is smaller than the sum of its proper divisors (49842924).

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

27690420 is a wasteful number, since it uses less digits than its factorization.

27690420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461519 (or 461517 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 27690420 is about 5262.1687544206. The cubic root of 27690420 is about 302.5356195107.

The spelling of 27690420 in words is "twenty-seven million, six hundred ninety thousand, four hundred twenty".