71470836 has 30 divisors (see below), whose sum is σ = 186839730. Its totient is φ = 23823504.

The previous prime is 71470829. The next prime is 71470891. The reversal of 71470836 is 63807417.

It can be written as a sum of positive squares in only one way, i.e., 70660836 + 810000 = 8406^2 + 900^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71470836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 109971 + ... + 110618.

It is an arithmetic number, because the mean of its divisors is an integer number (6227991).

Almost surely, 2^71470836 is an apocalyptic number.

It is an amenable number.

71470836 is an abundant number, since it is smaller than the sum of its proper divisors (115368894).

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

71470836 is a wasteful number, since it uses less digits than its factorization.

71470836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220605 (or 220594 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71470836 is about 8454.0425832852. The cubic root of 71470836 is about 414.9950858275.

The spelling of 71470836 in words is "seventy-one million, four hundred seventy thousand, eight hundred thirty-six".