71290044 has 180 divisors, whose sum is σ = 230885424. Its totient is φ = 18724608.

The previous prime is 71290039. The next prime is 71290057. The reversal of 71290044 is 44009217.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1657887 + ... + 1657929.

Almost surely, 2^71290044 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 71290044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115442712).

71290044 is an abundant number, since it is smaller than the sum of its proper divisors (159595380).

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

71290044 is a wasteful number, since it uses less digits than its factorization.

71290044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 71290044 is about 8443.3431767280. The cubic root of 71290044 is about 414.6448677151.

The spelling of 71290044 in words is "seventy-one million, two hundred ninety thousand, forty-four".