1805212064 has 24 divisors (see below), whose sum is σ = 3585469860. Its totient is φ = 894616576.

The previous prime is 1805212027. The next prime is 1805212067. The reversal of 1805212064 is 4602125081.

It can be written as a sum of positive squares in 2 ways, for example, as 1608651664 + 196560400 = 40108^2 + 14020^2 .

It is a super-2 number, since 2×1805212064² = 6517581192022280192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1805212067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245999 + ... + 253230.

Almost surely, 2^1805212064 is an apocalyptic number.

It is an amenable number.

1805212064 is a deficient number, since it is larger than the sum of its proper divisors (1780257796).

1805212064 is a wasteful number, since it uses less digits than its factorization.

1805212064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499352 (or 499344 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1805212064 is about 42487.7872335098. The cubic root of 1805212064 is about 1217.6133723608.

The spelling of 1805212064 in words is "one billion, eight hundred five million, two hundred twelve thousand, sixty-four".