1940423457 has 16 divisors (see below), whose sum is σ = 2983006080. Its totient is φ = 1098999552.

The previous prime is 1940423453. The next prime is 1940423473. The reversal of 1940423457 is 7543240491.

It is not a de Polignac number, because 1940423457 - 2² = 1940423453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940423453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406482 + ... + 411227.

It is an arithmetic number, because the mean of its divisors is an integer number (186437880).

Almost surely, 2^1940423457 is an apocalyptic number.

It is an amenable number.

1940423457 is a deficient number, since it is larger than the sum of its proper divisors (1042582623).

1940423457 is a wasteful number, since it uses less digits than its factorization.

1940423457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817832.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 1940423457 is about 44050.2378767697. The cubic root of 1940423457 is about 1247.2844423628.

The spelling of 1940423457 in words is "one billion, nine hundred forty million, four hundred twenty-three thousand, four hundred fifty-seven".