27729156 has 96 divisors (see below), whose sum is σ = 81034240. Its totient is φ = 7185024.

The previous prime is 27729137. The next prime is 27729167. The reversal of 27729156 is 65192772.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 72975 + ... + 73353.

Almost surely, 2^27729156 is an apocalyptic number.

27729156 is a gapful number since it is divisible by the number (26) 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 27729156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40517120).

27729156 is an abundant number, since it is smaller than the sum of its proper divisors (53305084).

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

27729156 is a wasteful number, since it uses less digits than its factorization.

27729156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 471 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 27729156 is about 5265.8480798443. The cubic root of 27729156 is about 302.6766256715.

The spelling of 27729156 in words is "twenty-seven million, seven hundred twenty-nine thousand, one hundred fifty-six".