81426486 has 32 divisors (see below), whose sum is σ = 172005120. Its totient is φ = 25645664.

The previous prime is 81426479. The next prime is 81426493. The reversal of 81426486 is 68462418.

It is an interprime number because it is at equal distance from previous prime (81426479) and next prime (81426493).

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, 7900 + ... + 15008.

It is an arithmetic number, because the mean of its divisors is an integer number (5375160).

Almost surely, 2^81426486 is an apocalyptic number.

81426486 is an abundant number, since it is smaller than the sum of its proper divisors (90578634).

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

81426486 is a wasteful number, since it uses less digits than its factorization.

81426486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7220.

The product of its digits is 73728, while the sum is 39.

The square root of 81426486 is about 9023.6625601803. The cubic root of 81426486 is about 433.4329239869.

The spelling of 81426486 in words is "eighty-one million, four hundred twenty-six thousand, four hundred eighty-six".