70006638 has 32 divisors (see below), whose sum is σ = 155988000. Its totient is φ = 20797056.

The previous prime is 70006633. The next prime is 70006691. The reversal of 70006638 is 83660007.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70006633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13213 + ... + 17736.

It is an arithmetic number, because the mean of its divisors is an integer number (4874625).

Almost surely, 2^70006638 is an apocalyptic number.

70006638 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

70006638 is an abundant number, since it is smaller than the sum of its proper divisors (85981362).

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

70006638 is a wasteful number, since it uses less digits than its factorization.

70006638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30996.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 70006638 is about 8366.9969523121. The cubic root of 70006638 is about 412.1415567557.

The spelling of 70006638 in words is "seventy million, six thousand, six hundred thirty-eight".