1210304640 has 128 divisors (see below), whose sum is σ = 3867595200. Its totient is φ = 321933312.

The previous prime is 1210304639. The next prime is 1210304663. The reversal of 1210304640 is 464030121.

It is a tau number, because it is divible by the number of its divisors (128).

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, 1418454 + ... + 1419306.

Almost surely, 2^1210304640 is an apocalyptic number.

1210304640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210304640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933797600).

1210304640 is an abundant number, since it is smaller than the sum of its proper divisors (2657290560).

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

1210304640 is an equidigital number, since it uses as much as digits as its factorization.

1210304640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1210304640 is about 34789.4328783900. The cubic root of 1210304640 is about 1065.6916576552.

Adding to 1210304640 its reverse (464030121), we get a palindrome (1674334761).

The spelling of 1210304640 in words is "one billion, two hundred ten million, three hundred four thousand, six hundred forty".