27801378 has 24 divisors (see below), whose sum is σ = 65712816. Its totient is φ = 8424600.

The previous prime is 27801373. The next prime is 27801379. The reversal of 27801378 is 87310872.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (27801373) 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 11 ways as a sum of consecutive naturals, for example, 70008 + ... + 70403.

It is an arithmetic number, because the mean of its divisors is an integer number (2738034).

Almost surely, 2^27801378 is an apocalyptic number.

27801378 is an abundant number, since it is smaller than the sum of its proper divisors (37911438).

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

27801378 is a wasteful number, since it uses less digits than its factorization.

27801378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140430 (or 140427 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 27801378 is about 5272.7012052647. The cubic root of 27801378 is about 302.9391767598.

The spelling of 27801378 in words is "twenty-seven million, eight hundred one thousand, three hundred seventy-eight".