1928436890 has 8 divisors (see below), whose sum is σ = 3471186420. Its totient is φ = 771374752.

The previous prime is 1928436827. The next prime is 1928436899. The reversal of 1928436890 is 986348291.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1925717689 + 2719201 = 43883^2 + 1649^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1928436899) 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, 96421835 + ... + 96421854.

Almost surely, 2^1928436890 is an apocalyptic number.

1928436890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1928436890 is a deficient number, since it is larger than the sum of its proper divisors (1542749530).

1928436890 is a wasteful number, since it uses less digits than its factorization.

1928436890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192843696.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1928436890 is about 43913.9714669489. The cubic root of 1928436890 is about 1244.7108547194.

The spelling of 1928436890 in words is "one billion, nine hundred twenty-eight million, four hundred thirty-six thousand, eight hundred ninety".