82145740 has 24 divisors (see below), whose sum is σ = 181586160. Its totient is φ = 31128768.

The previous prime is 82145731. The next prime is 82145761. The reversal of 82145740 is 4754128.

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, 107707 + ... + 108466.

It is an arithmetic number, because the mean of its divisors is an integer number (7566090).

Almost surely, 2^82145740 is an apocalyptic number.

It is an amenable number.

82145740 is an abundant number, since it is smaller than the sum of its proper divisors (99440420).

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

82145740 is a wasteful number, since it uses less digits than its factorization.

82145740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216201 (or 216199 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 82145740 is about 9063.4287110343. The cubic root of 82145740 is about 434.7053802802.

Adding to 82145740 its reverse (4754128), we get a palindrome (86899868).

The spelling of 82145740 in words is "eighty-two million, one hundred forty-five thousand, seven hundred forty".