71390484 has 108 divisors (see below), whose sum is σ = 206041472. Its totient is φ = 21597840.

The previous prime is 71390453. The next prime is 71390491. The reversal of 71390484 is 48409317.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117309 + ... + 117915.

Almost surely, 2^71390484 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 71390484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103020736).

71390484 is an abundant number, since it is smaller than the sum of its proper divisors (134650988).

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

71390484 is a wasteful number, since it uses less digits than its factorization.

71390484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 71390484 is about 8449.2889641673. The cubic root of 71390484 is about 414.8395063341.

The spelling of 71390484 in words is "seventy-one million, three hundred ninety thousand, four hundred eighty-four".