1204138990 has 8 divisors (see below), whose sum is σ = 2167450200. Its totient is φ = 481655592.

The previous prime is 1204138931. The next prime is 1204139047. The reversal of 1204138990 is 998314021.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 60206940 + ... + 60206959.

It is an arithmetic number, because the mean of its divisors is an integer number (270931275).

Almost surely, 2^1204138990 is an apocalyptic number.

1204138990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1204138990 is a deficient number, since it is larger than the sum of its proper divisors (963311210).

1204138990 is a wasteful number, since it uses less digits than its factorization.

1204138990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120413906.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1204138990 is about 34700.7059006009. The cubic root of 1204138990 is about 1063.8789264075.

It can be divided in two parts, 1204138 and 990, that added together give a triangular number (1205128 = T₁₅₅₂).

The spelling of 1204138990 in words is "one billion, two hundred four million, one hundred thirty-eight thousand, nine hundred ninety".