81828654 has 32 divisors (see below), whose sum is σ = 169979904. Its totient is φ = 26233440.

The previous prime is 81828653. The next prime is 81828673. The reversal of 81828654 is 45682818.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81828653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30907 + ... + 33449.

It is an arithmetic number, because the mean of its divisors is an integer number (5311872).

Almost surely, 2^81828654 is an apocalyptic number.

81828654 is an abundant number, since it is smaller than the sum of its proper divisors (88151250).

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

81828654 is a wasteful number, since it uses less digits than its factorization.

81828654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752.

The product of its digits is 122880, while the sum is 42.

The square root of 81828654 is about 9045.9191904416. The cubic root of 81828654 is about 434.1453320607.

It can be divided in two parts, 8182 and 8654, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 81828654 in words is "eighty-one million, eight hundred twenty-eight thousand, six hundred fifty-four".