70305500 has 24 divisors (see below), whose sum is σ = 153548304. Its totient is φ = 28122000.

The previous prime is 70305493. The next prime is 70305509. The reversal of 70305500 is 550307.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70305509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69806 + ... + 70805.

It is an arithmetic number, because the mean of its divisors is an integer number (6397846).

Almost surely, 2^70305500 is an apocalyptic number.

It is an amenable number.

70305500 is an abundant number, since it is smaller than the sum of its proper divisors (83242804).

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

70305500 is a wasteful number, since it uses less digits than its factorization.

70305500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140630 (or 140618 counting only the distinct ones).

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 70305500 is about 8384.8375058793. The cubic root of 70305500 is about 412.7272087739.

Adding to 70305500 its reverse (550307), we get a palindrome (70855807).

The spelling of 70305500 in words is "seventy million, three hundred five thousand, five hundred".