82190445 has 32 divisors (see below), whose sum is σ = 136080000. Its totient is φ = 42332160.

The previous prime is 82190443. The next prime is 82190453. The reversal of 82190445 is 54409128.

It is not a de Polignac number, because 82190445 - 2¹ = 82190443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82190443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65181 + ... + 66429.

It is an arithmetic number, because the mean of its divisors is an integer number (4252500).

Almost surely, 2^82190445 is an apocalyptic number.

It is an amenable number.

82190445 is a deficient number, since it is larger than the sum of its proper divisors (53889555).

82190445 is a wasteful number, since it uses less digits than its factorization.

82190445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 82190445 is about 9065.8946056084. The cubic root of 82190445 is about 434.7842238078.

The spelling of 82190445 in words is "eighty-two million, one hundred ninety thousand, four hundred forty-five".