71491308 has 24 divisors (see below), whose sum is σ = 190643712. Its totient is φ = 20426064.

The previous prime is 71491283. The next prime is 71491333. The reversal of 71491308 is 80319417.

It is an interprime number because it is at equal distance from previous prime (71491283) and next prime (71491333).

It is a super-2 number, since 2×71491308² = 10222014239101728, which contains 22 as substring.

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, 425460 + ... + 425627.

It is an arithmetic number, because the mean of its divisors is an integer number (7943488).

Almost surely, 2^71491308 is an apocalyptic number.

It is an amenable number.

71491308 is an abundant number, since it is smaller than the sum of its proper divisors (119152404).

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

71491308 is a wasteful number, since it uses less digits than its factorization.

71491308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851101 (or 851099 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 71491308 is about 8455.2532782880. The cubic root of 71491308 is about 415.0347055700.

The spelling of 71491308 in words is "seventy-one million, four hundred ninety-one thousand, three hundred eight".