1912738390 has 16 divisors (see below), whose sum is σ = 3444044832. Its totient is φ = 764847424.

The previous prime is 1912738369. The next prime is 1912738411. The reversal of 1912738390 is 938372191.

It is an interprime number because it is at equal distance from previous prime (1912738369) and next prime (1912738411).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3207 + ... + 61933.

It is an arithmetic number, because the mean of its divisors is an integer number (215252802).

Almost surely, 2^1912738390 is an apocalyptic number.

1912738390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1912738390 is a deficient number, since it is larger than the sum of its proper divisors (1531306442).

1912738390 is a wasteful number, since it uses less digits than its factorization.

1912738390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61991.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1912738390 is about 43734.8646962581. The cubic root of 1912738390 is about 1241.3241123614.

The spelling of 1912738390 in words is "one billion, nine hundred twelve million, seven hundred thirty-eight thousand, three hundred ninety".