71612406 has 24 divisors (see below), whose sum is σ = 163327320. Its totient is φ = 22614336.

The previous prime is 71612399. The next prime is 71612407. The reversal of 71612406 is 60421617.

71612406 is a `hidden beast` number, since 7 + 1 + 612 + 40 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 71612406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71612407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104355 + ... + 105038.

It is an arithmetic number, because the mean of its divisors is an integer number (6805305).

Almost surely, 2^71612406 is an apocalyptic number.

71612406 is an abundant number, since it is smaller than the sum of its proper divisors (91714914).

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

71612406 is a wasteful number, since it uses less digits than its factorization.

71612406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209420 (or 209417 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 71612406 is about 8462.4113584722. The cubic root of 71612406 is about 415.2689136284.

The spelling of 71612406 in words is "seventy-one million, six hundred twelve thousand, four hundred six".