71390940 has 48 divisors (see below), whose sum is σ = 200333952. Its totient is φ = 18995776.

The previous prime is 71390911. The next prime is 71390951. The reversal of 71390940 is 4909317.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34207 + ... + 36233.

It is an arithmetic number, because the mean of its divisors is an integer number (4173624).

Almost surely, 2^71390940 is an apocalyptic number.

It is an amenable number.

71390940 is an abundant number, since it is smaller than the sum of its proper divisors (128943012).

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

71390940 is a wasteful number, since it uses less digits than its factorization.

71390940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 71390940 is about 8449.3159486434. The cubic root of 71390940 is about 414.8403895816.

The spelling of 71390940 in words is "seventy-one million, three hundred ninety thousand, nine hundred forty".