70640090 has 16 divisors (see below), whose sum is σ = 127296360. Its totient is φ = 28224000.

The previous prime is 70640039. The next prime is 70640093. The reversal of 70640090 is 9004607.

It can be written as a sum of positive squares in 4 ways, for example, as 48011041 + 22629049 = 6929^2 + 4757^2 .

It is not an unprimeable number, because it can be changed into a prime (70640093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6590 + ... + 13590.

Almost surely, 2^70640090 is an apocalyptic number.

70640090 is a deficient number, since it is larger than the sum of its proper divisors (56656270).

70640090 is a wasteful number, since it uses less digits than its factorization.

70640090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8017.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 70640090 is about 8404.7659098871. The cubic root of 70640090 is about 413.3809077799.

Adding to 70640090 its reverse (9004607), we get a palindrome (79644697).

The spelling of 70640090 in words is "seventy million, six hundred forty thousand, ninety".