27631428 has 48 divisors (see below), whose sum is σ = 70652736. Its totient is φ = 8335360.

The previous prime is 27631423. The next prime is 27631451. The reversal of 27631428 is 82413672.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27631423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46300 + ... + 46892.

It is an arithmetic number, because the mean of its divisors is an integer number (1471932).

Almost surely, 2^27631428 is an apocalyptic number.

It is an amenable number.

27631428 is an abundant number, since it is smaller than the sum of its proper divisors (43021308).

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

27631428 is a wasteful number, since it uses less digits than its factorization.

27631428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 962 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 27631428 is about 5256.5604724002. The cubic root of 27631428 is about 302.3206249358.

The spelling of 27631428 in words is "twenty-seven million, six hundred thirty-one thousand, four hundred twenty-eight".