1943240985 has 24 divisors (see below), whose sum is σ = 3849468480. Its totient is φ = 888338592.

The previous prime is 1943240977. The next prime is 1943241007. The reversal of 1943240985 is 5890423491.

It is not a de Polignac number, because 1943240985 - 2³ = 1943240977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1943240985.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3084195 + ... + 3084824.

It is an arithmetic number, because the mean of its divisors is an integer number (160394520).

Almost surely, 2^1943240985 is an apocalyptic number.

1943240985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1943240985 is a deficient number, since it is larger than the sum of its proper divisors (1906227495).

1943240985 is a wasteful number, since it uses less digits than its factorization.

1943240985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169037 (or 6169034 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1943240985 is about 44082.2071248707. The cubic root of 1943240985 is about 1247.8878431784.

The spelling of 1943240985 in words is "one billion, nine hundred forty-three million, two hundred forty thousand, nine hundred eighty-five".