70775144 has 32 divisors (see below), whose sum is σ = 146219040. Its totient is φ = 31848000.

The previous prime is 70775137. The next prime is 70775147. The reversal of 70775144 is 44157707.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (70775147) 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, 4907 + ... + 12869.

It is an arithmetic number, because the mean of its divisors is an integer number (4569345).

Almost surely, 2^70775144 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 70775144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73109520).

70775144 is an abundant number, since it is smaller than the sum of its proper divisors (75443896).

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

70775144 is a wasteful number, since it uses less digits than its factorization.

70775144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081 (or 8077 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 70775144 is about 8412.7964435139. The cubic root of 70775144 is about 413.6441822837.

It can be divided in two parts, 7077 and 5144, that added together give a palindrome (12221).

The spelling of 70775144 in words is "seventy million, seven hundred seventy-five thousand, one hundred forty-four".