1304213240 has 32 divisors (see below), whose sum is σ = 3201251760. Its totient is φ = 474259200.

The previous prime is 1304213233. The next prime is 1304213243. The reversal of 1304213240 is 423124031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304213243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481621 + ... + 1482500.

Almost surely, 2^1304213240 is an apocalyptic number.

1304213240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304213240 is an abundant number, since it is smaller than the sum of its proper divisors (1897038520).

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

1304213240 is a wasteful number, since it uses less digits than its factorization.

1304213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964143 (or 2964139 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1304213240 is about 36113.8926176617. The cubic root of 1304213240 is about 1092.5706629200.

Adding to 1304213240 its reverse (423124031), we get a palindrome (1727337271).

The spelling of 1304213240 in words is "one billion, three hundred four million, two hundred thirteen thousand, two hundred forty".