71399388 has 48 divisors (see below), whose sum is σ = 178101504. Its totient is φ = 22183680.

The previous prime is 71399387. The next prime is 71399407. The reversal of 71399388 is 88399317.

Its product of digits (326592) is a multiple of the sum of its prime factors (3402).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71399387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20193 + ... + 23463.

It is an arithmetic number, because the mean of its divisors is an integer number (3710448).

Almost surely, 2^71399388 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 71399388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89050752).

71399388 is an abundant number, since it is smaller than the sum of its proper divisors (106702116).

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

71399388 is a wasteful number, since it uses less digits than its factorization.

71399388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402 (or 3400 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 71399388 is about 8449.8158559817. The cubic root of 71399388 is about 414.8567522246.

The spelling of 71399388 in words is "seventy-one million, three hundred ninety-nine thousand, three hundred eighty-eight".