82440045 has 16 divisors (see below), whose sum is σ = 146560320. Its totient is φ = 43967952.

The previous prime is 82440037. The next prime is 82440047. The reversal of 82440045 is 54004428.

It is not a de Polignac number, because 82440045 - 2³ = 82440037 is a prime.

It is a super-2 number, since 2×82440045² = 13592722039204050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82440047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305199 + ... + 305468.

It is an arithmetic number, because the mean of its divisors is an integer number (9160020).

Almost surely, 2^82440045 is an apocalyptic number.

It is an amenable number.

82440045 is a deficient number, since it is larger than the sum of its proper divisors (64120275).

82440045 is a wasteful number, since it uses less digits than its factorization.

82440045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610681 (or 610675 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 82440045 is about 9079.6500483223. The cubic root of 82440045 is about 435.2239037572.

The spelling of 82440045 in words is "eighty-two million, four hundred forty thousand, forty-five".