27720291000 has 128 divisors (see below), whose sum is σ = 87905712960. Its totient is φ = 7270848000.

The previous prime is 27720290981. The next prime is 27720291031. The reversal of 27720291000 is 19202772.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107262 + ... + 258738.

Almost surely, 2^27720291000 is an apocalyptic number.

27720291000 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 27720291000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43952856480).

27720291000 is an abundant number, since it is smaller than the sum of its proper divisors (60185421960).

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

27720291000 is a wasteful number, since it uses less digits than its factorization.

27720291000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151562 (or 151548 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

Adding to 27720291000 its reverse (19202772), we get a palindrome (27739493772).

The spelling of 27720291000 in words is "twenty-seven billion, seven hundred twenty million, two hundred ninety-one thousand".