1909770490 has 16 divisors (see below), whose sum is σ = 3481102080. Its totient is φ = 754238160.

The previous prime is 1909770487. The next prime is 1909770491. The reversal of 1909770490 is 940779091.

It is a self number, because there is not a number n which added to its sum of digits gives 1909770490.

It is not an unprimeable number, because it can be changed into a prime (1909770491) 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 7 ways as a sum of consecutive naturals, for example, 1207926 + ... + 1209505.

It is an arithmetic number, because the mean of its divisors is an integer number (217568880).

Almost surely, 2^1909770490 is an apocalyptic number.

1909770490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1909770490 is a deficient number, since it is larger than the sum of its proper divisors (1571331590).

1909770490 is a wasteful number, since it uses less digits than its factorization.

1909770490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417517.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 1909770490 is about 43700.9209285113. The cubic root of 1909770490 is about 1240.6817465980.

The spelling of 1909770490 in words is "one billion, nine hundred nine million, seven hundred seventy thousand, four hundred ninety".