71241830 has 64 divisors (see below), whose sum is σ = 149299200. Its totient is φ = 24203520.

The previous prime is 71241803. The next prime is 71241869. The reversal of 71241830 is 3814217.

Together with 78057370 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 71241830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185819 + ... + 186201.

It is an arithmetic number, because the mean of its divisors is an integer number (2332800).

Almost surely, 2^71241830 is an apocalyptic number.

71241830 is an abundant number, since it is smaller than the sum of its proper divisors (78057370).

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

71241830 is a wasteful number, since it uses less digits than its factorization.

71241830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 71241830 is about 8440.4875451599. The cubic root of 71241830 is about 414.5513708065.

The spelling of 71241830 in words is "seventy-one million, two hundred forty-one thousand, eight hundred thirty".