81396354 has 16 divisors (see below), whose sum is σ = 175315392. Its totient is φ = 25045008.

The previous prime is 81396349. The next prime is 81396383. The reversal of 81396354 is 45369318.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521694 + ... + 521849.

It is an arithmetic number, because the mean of its divisors is an integer number (10957212).

Almost surely, 2^81396354 is an apocalyptic number.

81396354 is an abundant number, since it is smaller than the sum of its proper divisors (93919038).

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

81396354 is a wasteful number, since it uses less digits than its factorization.

81396354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043561.

The product of its digits is 77760, while the sum is 39.

The square root of 81396354 is about 9021.9927953862. The cubic root of 81396354 is about 433.3794532109.

The spelling of 81396354 in words is "eighty-one million, three hundred ninety-six thousand, three hundred fifty-four".