1640226306 has 32 divisors (see below), whose sum is σ = 3397943808. Its totient is φ = 527281920.

The previous prime is 1640226299. The next prime is 1640226323. The reversal of 1640226306 is 6036220461.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39450 + ... + 69546.

It is an arithmetic number, because the mean of its divisors is an integer number (106185744).

Almost surely, 2^1640226306 is an apocalyptic number.

1640226306 is an abundant number, since it is smaller than the sum of its proper divisors (1757717502).

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

1640226306 is a wasteful number, since it uses less digits than its factorization.

1640226306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30426.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1640226306 is about 40499.7074804251. The cubic root of 1640226306 is about 1179.3279487341.

Adding to 1640226306 its reverse (6036220461), we get a palindrome (7676446767).

The spelling of 1640226306 in words is "one billion, six hundred forty million, two hundred twenty-six thousand, three hundred six".