82140424 has 8 divisors (see below), whose sum is σ = 154013310. Its totient is φ = 41070208.

The previous prime is 82140419. The next prime is 82140431. The reversal of 82140424 is 42404128.

It can be written as a sum of positive squares in only one way, i.e., 80676324 + 1464100 = 8982^2 + 1210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133769 + ... + 5133784.

Almost surely, 2^82140424 is an apocalyptic number.

It is an amenable number.

82140424 is a deficient number, since it is larger than the sum of its proper divisors (71872886).

82140424 is a wasteful number, since it uses less digits than its factorization.

82140424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267559 (or 10267555 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 82140424 is about 9063.1354397912. The cubic root of 82140424 is about 434.6960028669.

The spelling of 82140424 in words is "eighty-two million, one hundred forty thousand, four hundred twenty-four".