70722290 has 16 divisors (see below), whose sum is σ = 127538712. Its totient is φ = 28235904.

The previous prime is 70722283. The next prime is 70722307. The reversal of 70722290 is 9222707.

It can be written as a sum of positive squares in 4 ways, for example, as 29800681 + 40921609 = 5459^2 + 6397^2 .

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 7 ways as a sum of consecutive naturals, for example, 779 + ... + 11918.

Almost surely, 2^70722290 is an apocalyptic number.

70722290 is a deficient number, since it is larger than the sum of its proper divisors (56816422).

70722290 is a wasteful number, since it uses less digits than its factorization.

70722290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13261.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 70722290 is about 8409.6545707895. The cubic root of 70722290 is about 413.5411885258.

Adding to 70722290 its reverse (9222707), we get a palindrome (79944997).

The spelling of 70722290 in words is "seventy million, seven hundred twenty-two thousand, two hundred ninety".