70075638 has 64 divisors (see below), whose sum is σ = 161441280. Its totient is φ = 22516704.

The previous prime is 70075633. The next prime is 70075673. The reversal of 70075638 is 83657007.

It is a super-2 number, since 2×70075638² = 9821190082214088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70075631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239020 + ... + 239312.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^70075638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70075638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80720640).

70075638 is an abundant number, since it is smaller than the sum of its proper divisors (91365642).

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

70075638 is a wasteful number, since it uses less digits than its factorization.

70075638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 70075638 is about 8371.1192800007. The cubic root of 70075638 is about 412.2769173938.

The spelling of 70075638 in words is "seventy million, seventy-five thousand, six hundred thirty-eight".