27827780386 has 32 divisors (see below), whose sum is σ = 52252698240. Its totient is φ = 10837591296.

The previous prime is 27827780341. The next prime is 27827780411. The reversal of 27827780386 is 68308772872.

It is a happy number.

It is a super-2 number, since 2×27827780386² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 27827780386.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2009020 + ... + 2022823.

It is an arithmetic number, because the mean of its divisors is an integer number (1632896820).

Almost surely, 2^27827780386 is an apocalyptic number.

27827780386 is a deficient number, since it is larger than the sum of its proper divisors (24424917854).

27827780386 is a wasteful number, since it uses less digits than its factorization.

27827780386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031898.

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 27827780386 in words is "twenty-seven billion, eight hundred twenty-seven million, seven hundred eighty thousand, three hundred eighty-six".