71906140 has 24 divisors (see below), whose sum is σ = 152418672. Its totient is φ = 28492800.

The previous prime is 71906111. The next prime is 71906147. The reversal of 71906140 is 4160917.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71906099 and 71906108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71906147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14661 + ... + 18940.

It is an arithmetic number, because the mean of its divisors is an integer number (6350778).

Almost surely, 2^71906140 is an apocalyptic number.

It is an amenable number.

71906140 is an abundant number, since it is smaller than the sum of its proper divisors (80512532).

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

71906140 is a wasteful number, since it uses less digits than its factorization.

71906140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33717 (or 33715 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 71906140 is about 8479.7488170346. The cubic root of 71906140 is about 415.8359113079.

The spelling of 71906140 in words is "seventy-one million, nine hundred six thousand, one hundred forty".