81474268 has 12 divisors (see below), whose sum is σ = 150967152. Its totient is φ = 38340800.

The previous prime is 81474241. The next prime is 81474269. The reversal of 81474268 is 86247418.

It is a super-2 number, since 2×81474268² = 13276112692271648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81474268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81474269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599008 + ... + 599143.

It is an arithmetic number, because the mean of its divisors is an integer number (12580596).

Almost surely, 2^81474268 is an apocalyptic number.

It is an amenable number.

81474268 is a deficient number, since it is larger than the sum of its proper divisors (69492884).

81474268 is a wasteful number, since it uses less digits than its factorization.

81474268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198172 (or 1198170 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 81474268 is about 9026.3097664549. The cubic root of 81474268 is about 433.5176885531.

The spelling of 81474268 in words is "eighty-one million, four hundred seventy-four thousand, two hundred sixty-eight".