81494448 has 60 divisors (see below), whose sum is σ = 244906200. Its totient is φ = 23283456.

The previous prime is 81494431. The next prime is 81494473. The reversal of 81494448 is 84449418.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14973 + ... + 19676.

It is an arithmetic number, because the mean of its divisors is an integer number (4081770).

Almost surely, 2^81494448 is an apocalyptic number.

It is an amenable number.

81494448 is an abundant number, since it is smaller than the sum of its proper divisors (163411752).

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

81494448 is a wasteful number, since it uses less digits than its factorization.

81494448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34674 (or 34661 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 81494448 is about 9027.4275405566. The cubic root of 81494448 is about 433.5534776228.

The spelling of 81494448 in words is "eighty-one million, four hundred ninety-four thousand, four hundred forty-eight".