71963840 has 56 divisors (see below), whose sum is σ = 184556400. Its totient is φ = 26569728.

The previous prime is 71963831. The next prime is 71963851. The reversal of 71963840 is 4836917.

It is a junction number, because it is equal to n+sod(n) for n = 71963794 and 71963803.

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, 4490 + ... + 12809.

It is an arithmetic number, because the mean of its divisors is an integer number (3295650).

Almost surely, 2^71963840 is an apocalyptic number.

It is an amenable number.

71963840 is an abundant number, since it is smaller than the sum of its proper divisors (112592560).

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

71963840 is a wasteful number, since it uses less digits than its factorization.

71963840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17329 (or 17319 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 71963840 is about 8483.1503582101. The cubic root of 71963840 is about 415.9471086602.

The spelling of 71963840 in words is "seventy-one million, nine hundred sixty-three thousand, eight hundred forty".