1204323890 has 96 divisors (see below), whose sum is σ = 2817642240. Its totient is φ = 362355840.

The previous prime is 1204323889. The next prime is 1204323917. The reversal of 1204323890 is 983234021.

1204323890 = 20035² + 20036² + 20037².

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 243179 + ... + 248081.

It is an arithmetic number, because the mean of its divisors is an integer number (29350440).

Almost surely, 2^1204323890 is an apocalyptic number.

1204323890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1204323890 is an abundant number, since it is smaller than the sum of its proper divisors (1613318350).

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

1204323890 is a wasteful number, since it uses less digits than its factorization.

1204323890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4957 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1204323890 is about 34703.3700092657. The cubic root of 1204323890 is about 1063.9333778032.

The spelling of 1204323890 in words is "one billion, two hundred four million, three hundred twenty-three thousand, eight hundred ninety".