81274008 has 64 divisors (see below), whose sum is σ = 222588000. Its totient is φ = 24614912.

The previous prime is 81273989. The next prime is 81274027. The reversal of 81274008 is 80047218.

It is an interprime number because it is at equal distance from previous prime (81273989) and next prime (81274027).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8398 + ... + 15266.

Almost surely, 2^81274008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81274008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111294000).

81274008 is an abundant number, since it is smaller than the sum of its proper divisors (141313992).

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

81274008 is a wasteful number, since it uses less digits than its factorization.

81274008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924 (or 6920 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 81274008 is about 9015.2098145301. The cubic root of 81274008 is about 433.1622083021.

The spelling of 81274008 in words is "eighty-one million, two hundred seventy-four thousand, eight".