27880690000 has 50 divisors (see below), whose sum is σ = 67501962770. Its totient is φ = 11152272000.

The previous prime is 27880689983. The next prime is 27880690001. The reversal of 27880690000 is 9608872.

It can be written as a sum of positive squares in 5 ways, for example, as 3716609296 + 24164080704 = 60964^2 + 155448^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a super-2 number, since 2×27880690000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27880690001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1384035 + ... + 1404034.

Almost surely, 2^27880690000 is an apocalyptic number.

27880690000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27880690000 is an abundant number, since it is smaller than the sum of its proper divisors (39621272770).

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

27880690000 is an equidigital number, since it uses as much as digits as its factorization.

27880690000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788097 (or 2788076 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 27880690000 in words is "twenty-seven billion, eight hundred eighty million, six hundred ninety thousand".