1640441210 has 16 divisors (see below), whose sum is σ = 2965050792. Its totient is φ = 653452800.

The previous prime is 1640441207. The next prime is 1640441221. The reversal of 1640441210 is 121440461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1636445209 + 3996001 = 40453^2 + 1999^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337931 + ... + 342750.

Almost surely, 2^1640441210 is an apocalyptic number.

1640441210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640441210 is a deficient number, since it is larger than the sum of its proper divisors (1324609582).

1640441210 is a wasteful number, since it uses less digits than its factorization.

1640441210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680929.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1640441210 is about 40502.3605484915. The cubic root of 1640441210 is about 1179.3794520388.

Adding to 1640441210 its reverse (121440461), we get a palindrome (1761881671).

The spelling of 1640441210 in words is "one billion, six hundred forty million, four hundred forty-one thousand, two hundred ten".