70018690 has 32 divisors (see below), whose sum is σ = 144820224. Its totient is φ = 23876160.

The previous prime is 70018687. The next prime is 70018691. The reversal of 70018690 is 9681007.

It is a super-2 number, since 2×70018690² = 9805233898632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70018691) 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, 10752 + ... + 15988.

It is an arithmetic number, because the mean of its divisors is an integer number (4525632).

Almost surely, 2^70018690 is an apocalyptic number.

70018690 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

70018690 is an abundant number, since it is smaller than the sum of its proper divisors (74801534).

70018690 is a wasteful number, since it uses less digits than its factorization.

70018690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 70018690 is about 8367.7171319303. The cubic root of 70018690 is about 412.1652061560.

Adding to 70018690 its reverse (9681007), we get a palindrome (79699697).

The spelling of 70018690 in words is "seventy million, eighteen thousand, six hundred ninety".