70005990 has 16 divisors (see below), whose sum is σ = 168014448. Its totient is φ = 18668256.

The previous prime is 70005989. The next prime is 70006003. The reversal of 70005990 is 9950007.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2333533 = 70005990 / (7 + 0 + 0 + 0 + 5 + 9 + 9 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166737 + ... + 1166796.

It is an arithmetic number, because the mean of its divisors is an integer number (10500903).

Almost surely, 2^70005990 is an apocalyptic number.

70005990 is an abundant number, since it is smaller than the sum of its proper divisors (98008458).

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

70005990 is a wasteful number, since it uses less digits than its factorization.

70005990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333543.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 70005990 is about 8366.9582286516. The cubic root of 70005990 is about 412.1402851212.

Adding to 70005990 its reverse (9950007), we get a palindrome (79955997).

The spelling of 70005990 in words is "seventy million, five thousand, nine hundred ninety".