71630370 has 96 divisors (see below), whose sum is σ = 216148608. Its totient is φ = 16118784.

The previous prime is 71630359. The next prime is 71630371. The reversal of 71630370 is 7303617.

It is not an unprimeable number, because it can be changed into a prime (71630371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41362 + ... + 43058.

It is an arithmetic number, because the mean of its divisors is an integer number (2251548).

Almost surely, 2^71630370 is an apocalyptic number.

71630370 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71630370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108074304).

71630370 is an abundant number, since it is smaller than the sum of its proper divisors (144518238).

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

71630370 is a wasteful number, since it uses less digits than its factorization.

71630370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 71630370 is about 8463.4726915138. The cubic root of 71630370 is about 415.3036341817.

Adding to 71630370 its reverse (7303617), we get a palindrome (78933987).

The spelling of 71630370 in words is "seventy-one million, six hundred thirty thousand, three hundred seventy".