71642424 has 64 divisors (see below), whose sum is σ = 213603840. Its totient is φ = 19578240.

The previous prime is 71642411. The next prime is 71642443. The reversal of 71642424 is 42424617.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 71642391 and 71642400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5407 + ... + 13134.

It is an arithmetic number, because the mean of its divisors is an integer number (3337560).

Almost surely, 2^71642424 is an apocalyptic number.

It is an amenable number.

71642424 is an abundant number, since it is smaller than the sum of its proper divisors (141961416).

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

71642424 is a wasteful number, since it uses less digits than its factorization.

71642424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18580 (or 18576 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 71642424 is about 8464.1847805917. The cubic root of 71642424 is about 415.3269287202.

The spelling of 71642424 in words is "seventy-one million, six hundred forty-two thousand, four hundred twenty-four".