71604330 has 64 divisors (see below), whose sum is σ = 197164800. Its totient is φ = 16303104.

The previous prime is 71604319. The next prime is 71604341. The reversal of 71604330 is 3340617.

It is an interprime number because it is at equal distance from previous prime (71604319) and next prime (71604341).

It is a self number, because there is not a number n which added to its sum of digits gives 71604330.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72802 + ... + 73778.

It is an arithmetic number, because the mean of its divisors is an integer number (3080700).

Almost surely, 2^71604330 is an apocalyptic number.

71604330 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 71604330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98582400).

71604330 is an abundant number, since it is smaller than the sum of its proper divisors (125560470).

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

71604330 is a wasteful number, since it uses less digits than its factorization.

71604330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 71604330 is about 8461.9341760616. The cubic root of 71604330 is about 415.2533025632.

Adding to 71604330 its reverse (3340617), we get a palindrome (74944947).

The spelling of 71604330 in words is "seventy-one million, six hundred four thousand, three hundred thirty".