70634320 has 80 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 26347520.

The previous prime is 70634309. The next prime is 70634321. The reversal of 70634320 is 2343607.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70634321) 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, 226965 + ... + 227275.

Almost surely, 2^70634320 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 70634320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87744384).

70634320 is an abundant number, since it is smaller than the sum of its proper divisors (104854448).

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

70634320 is a wasteful number, since it uses less digits than its factorization.

70634320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 70634320 is about 8404.4226452505. The cubic root of 70634320 is about 413.3696522601.

Adding to 70634320 its reverse (2343607), we get a palindrome (72977927).

The spelling of 70634320 in words is "seventy million, six hundred thirty-four thousand, three hundred twenty".