1905480890 has 8 divisors (see below), whose sum is σ = 3429865620. Its totient is φ = 762192352.

The previous prime is 1905480881. The next prime is 1905480917. The reversal of 1905480890 is 980845091.

It can be written as a sum of positive squares in 2 ways, for example, as 1837236769 + 68244121 = 42863^2 + 8261^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95274035 + ... + 95274054.

Almost surely, 2^1905480890 is an apocalyptic number.

1905480890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1905480890 is a deficient number, since it is larger than the sum of its proper divisors (1524384730).

1905480890 is a wasteful number, since it uses less digits than its factorization.

1905480890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190548096.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 1905480890 is about 43651.8142807375. The cubic root of 1905480890 is about 1239.7521378500.

The spelling of 1905480890 in words is "one billion, nine hundred five million, four hundred eighty thousand, eight hundred ninety".