70505900 has 54 divisors (see below), whose sum is σ = 156560292. Its totient is φ = 27560000.

The previous prime is 70505881. The next prime is 70505917. The reversal of 70505900 is 950507.

It is a self number, because there is not a number n which added to its sum of digits gives 70505900.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 280775 + ... + 281025.

Almost surely, 2^70505900 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 70505900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78280146).

70505900 is an abundant number, since it is smaller than the sum of its proper divisors (86054392).

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

70505900 is a wasteful number, since it uses less digits than its factorization.

70505900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 26.

The square root of 70505900 is about 8396.7791444101. The cubic root of 70505900 is about 413.1189849997.

The spelling of 70505900 in words is "seventy million, five hundred five thousand, nine hundred".