27421740 has 60 divisors (see below), whose sum is σ = 86028096. Its totient is φ = 7312032.

The previous prime is 27421739. The next prime is 27421747. The reversal of 27421740 is 4712472.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (27421747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6844 + ... + 10083.

Almost surely, 2^27421740 is an apocalyptic number.

27421740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27421740 is an abundant number, since it is smaller than the sum of its proper divisors (58606356).

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

27421740 is a wasteful number, since it uses less digits than its factorization.

27421740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948 (or 16937 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 27421740 is about 5236.5771263298. The cubic root of 27421740 is about 301.5539370348.

The spelling of 27421740 in words is "twenty-seven million, four hundred twenty-one thousand, seven hundred forty".