27345780 has 144 divisors (see below), whose sum is σ = 103469184. Its totient is φ = 5679360.

The previous prime is 27345763. The next prime is 27345803. The reversal of 27345780 is 8754372.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 12874 + ... + 14846.

It is an arithmetic number, because the mean of its divisors is an integer number (718536).

Almost surely, 2^27345780 is an apocalyptic number.

27345780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27345780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51734592).

27345780 is an abundant number, since it is smaller than the sum of its proper divisors (76123404).

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

27345780 is a wasteful number, since it uses less digits than its factorization.

27345780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 2001 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 27345780 is about 5229.3192673617. The cubic root of 27345780 is about 301.2752382108.

The spelling of 27345780 in words is "twenty-seven million, three hundred forty-five thousand, seven hundred eighty".