70072890 has 32 divisors (see below), whose sum is σ = 171351936. Its totient is φ = 18333120.

The previous prime is 70072879. The next prime is 70072901. The reversal of 70072890 is 9827007.

It is an interprime number because it is at equal distance from previous prime (70072879) and next prime (70072901).

It is a Curzon number.

It is an unprimeable number.

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, 20446 + ... + 23625.

It is an arithmetic number, because the mean of its divisors is an integer number (5354748).

Almost surely, 2^70072890 is an apocalyptic number.

70072890 is an abundant number, since it is smaller than the sum of its proper divisors (101279046).

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

70072890 is a wasteful number, since it uses less digits than its factorization.

70072890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44134.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 70072890 is about 8370.9551426346. The cubic root of 70072890 is about 412.2715282086.

Adding to 70072890 its reverse (9827007), we get a palindrome (79899897).

The spelling of 70072890 in words is "seventy million, seventy-two thousand, eight hundred ninety".