81429498 has 24 divisors (see below), whose sum is σ = 182123136. Its totient is φ = 26267400.

The previous prime is 81429443. The next prime is 81429503. The reversal of 81429498 is 89492418.

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, 72408 + ... + 73523.

It is an arithmetic number, because the mean of its divisors is an integer number (7588464).

Almost surely, 2^81429498 is an apocalyptic number.

81429498 is an abundant number, since it is smaller than the sum of its proper divisors (100693638).

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

81429498 is a wasteful number, since it uses less digits than its factorization.

81429498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145970 (or 145967 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 81429498 is about 9023.8294531756. The cubic root of 81429498 is about 433.4382682098.

The spelling of 81429498 in words is "eighty-one million, four hundred twenty-nine thousand, four hundred ninety-eight".