70099638 has 32 divisors (see below), whose sum is σ = 160475904. Its totient is φ = 19997472.

The previous prime is 70099633. The next prime is 70099657. The reversal of 70099638 is 83699007.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70099638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70099633) 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 15 ways as a sum of consecutive naturals, for example, 52981 + ... + 54287.

It is an arithmetic number, because the mean of its divisors is an integer number (5014872).

Almost surely, 2^70099638 is an apocalyptic number.

70099638 is an abundant number, since it is smaller than the sum of its proper divisors (90376266).

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

70099638 is a wasteful number, since it uses less digits than its factorization.

70099638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 70099638 is about 8372.5526573441. The cubic root of 70099638 is about 412.3239785262.

The spelling of 70099638 in words is "seventy million, ninety-nine thousand, six hundred thirty-eight".