71390478 has 16 divisors (see below), whose sum is σ = 142969680. Its totient is φ = 23765376.

The previous prime is 71390453. The next prime is 71390491. The reversal of 71390478 is 87409317.

It is a congruent number.

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, 2683 + ... + 12246.

It is an arithmetic number, because the mean of its divisors is an integer number (8935605).

Almost surely, 2^71390478 is an apocalyptic number.

71390478 is an abundant number, since it is smaller than the sum of its proper divisors (71579202).

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

71390478 is a wasteful number, since it uses less digits than its factorization.

71390478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 71390478 is about 8449.2886091079. The cubic root of 71390478 is about 414.8394947124.

The spelling of 71390478 in words is "seventy-one million, three hundred ninety thousand, four hundred seventy-eight".