82156444 has 24 divisors (see below), whose sum is σ = 152560800. Its totient is φ = 38578176.

The previous prime is 82156441. The next prime is 82156469. The reversal of 82156444 is 44465128.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82156441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39724 + ... + 41740.

It is an arithmetic number, because the mean of its divisors is an integer number (6356700).

Almost surely, 2^82156444 is an apocalyptic number.

It is an amenable number.

82156444 is a deficient number, since it is larger than the sum of its proper divisors (70404356).

82156444 is a wasteful number, since it uses less digits than its factorization.

82156444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 82156444 is about 9064.0191968023. The cubic root of 82156444 is about 434.7242608872.

The spelling of 82156444 in words is "eighty-two million, one hundred fifty-six thousand, four hundred forty-four".