71142396 has 96 divisors (see below), whose sum is σ = 189063168. Its totient is φ = 20666880.

The previous prime is 71142389. The next prime is 71142431. The reversal of 71142396 is 69324117.

It is a super-2 number, since 2×71142396² = 10122481017241632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227136 + ... + 227448.

It is an arithmetic number, because the mean of its divisors is an integer number (1969408).

Almost surely, 2^71142396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71142396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94531584).

71142396 is an abundant number, since it is smaller than the sum of its proper divisors (117920772).

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

71142396 is a wasteful number, since it uses less digits than its factorization.

71142396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 409 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 71142396 is about 8434.5951888635. The cubic root of 71142396 is about 414.3584144428.

The spelling of 71142396 in words is "seventy-one million, one hundred forty-two thousand, three hundred ninety-six".