71278470 has 48 divisors (see below), whose sum is σ = 185816592. Its totient is φ = 18957120.

The previous prime is 71278463. The next prime is 71278483. The reversal of 71278470 is 7487217.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43384 + ... + 44996.

It is an arithmetic number, because the mean of its divisors is an integer number (3871179).

Almost surely, 2^71278470 is an apocalyptic number.

71278470 is an abundant number, since it is smaller than the sum of its proper divisors (114538122).

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

71278470 is a wasteful number, since it uses less digits than its factorization.

71278470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2114 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 71278470 is about 8442.6577568915. The cubic root of 71278470 is about 414.6224271836.

The spelling of 71278470 in words is "seventy-one million, two hundred seventy-eight thousand, four hundred seventy".