27173728 has 12 divisors (see below), whose sum is σ = 53498340. Its totient is φ = 13586848.

The previous prime is 27173687. The next prime is 27173737. The reversal of 27173728 is 82737172.

It is a super-2 number, since 2×27173728² = 1476822986835968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424558 + ... + 424621.

It is an arithmetic number, because the mean of its divisors is an integer number (4458195).

Almost surely, 2^27173728 is an apocalyptic number.

It is an amenable number.

27173728 is a deficient number, since it is larger than the sum of its proper divisors (26324612).

27173728 is an equidigital number, since it uses as much as digits as its factorization.

27173728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849189 (or 849181 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 27173728 is about 5212.8426026497. The cubic root of 27173728 is about 300.6420619117.

Adding to 27173728 its product of digits (32928), we get a square (27206656 = 5216²).

It can be divided in two parts, 27 and 173728, that added together give a triangular number (173755 = T₅₈₉).

The spelling of 27173728 in words is "twenty-seven million, one hundred seventy-three thousand, seven hundred twenty-eight".