1900205390 has 16 divisors (see below), whose sum is σ = 3600389520. Its totient is φ = 720077760.

The previous prime is 1900205297. The next prime is 1900205431. The reversal of 1900205390 is 935020091.

It is a super-2 number, since 2×1900205390² = 7221561048370104200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000351 + ... + 5000730.

It is an arithmetic number, because the mean of its divisors is an integer number (225024345).

Almost surely, 2^1900205390 is an apocalyptic number.

1900205390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1900205390 is a deficient number, since it is larger than the sum of its proper divisors (1700184130).

1900205390 is a wasteful number, since it uses less digits than its factorization.

1900205390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001107.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 1900205390 is about 43591.3453566187. The cubic root of 1900205390 is about 1238.6069575514.

The spelling of 1900205390 in words is "one billion, nine hundred million, two hundred five thousand, three hundred ninety".