1304020390 has 8 divisors (see below), whose sum is σ = 2347236720. Its totient is φ = 521608152.

The previous prime is 1304020349. The next prime is 1304020391. The reversal of 1304020390 is 930204031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304020391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65201010 + ... + 65201029.

It is an arithmetic number, because the mean of its divisors is an integer number (293404590).

Almost surely, 2^1304020390 is an apocalyptic number.

1304020390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1304020390 is a deficient number, since it is larger than the sum of its proper divisors (1043216330).

1304020390 is a wasteful number, since it uses less digits than its factorization.

1304020390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130402046.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1304020390 is about 36111.2224938453. Note that the first 3 decimals coincide. The cubic root of 1304020390 is about 1092.5168085777.

The spelling of 1304020390 in words is "one billion, three hundred four million, twenty thousand, three hundred ninety".