71621396 has 48 divisors (see below), whose sum is σ = 157581312. Its totient is φ = 27669600.

The previous prime is 71621299. The next prime is 71621399. The reversal of 71621396 is 69312617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71621399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38201 + ... + 40031.

It is an arithmetic number, because the mean of its divisors is an integer number (3282944).

Almost surely, 2^71621396 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 71621396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78790656).

71621396 is an abundant number, since it is smaller than the sum of its proper divisors (85959916).

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

71621396 is a wasteful number, since it uses less digits than its factorization.

71621396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980 (or 1978 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 71621396 is about 8462.9425142795. The cubic root of 71621396 is about 415.2862900930.

It can be divided in two parts, 7162 and 1396, that added together give a palindrome (8558).

The spelling of 71621396 in words is "seventy-one million, six hundred twenty-one thousand, three hundred ninety-six".