1940284831 has 4 divisors (see below), whose sum is σ = 1954447632. Its totient is φ = 1926122032.

The previous prime is 1940284813. The next prime is 1940284873. The reversal of 1940284831 is 1384820491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1384820491 = 19 ⋅72885289.

It is a cyclic number.

It is not a de Polignac number, because 1940284831 - 2²⁷ = 1806067103 is a prime.

It is a super-2 number, since 2×1940284831² = 7529410450817397122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940284891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7081195 + ... + 7081468.

It is an arithmetic number, because the mean of its divisors is an integer number (488611908).

Almost surely, 2^1940284831 is an apocalyptic number.

1940284831 is a deficient number, since it is larger than the sum of its proper divisors (14162801).

1940284831 is a wasteful number, since it uses less digits than its factorization.

1940284831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14162800.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1940284831 is about 44048.6643497848. The cubic root of 1940284831 is about 1247.2547391949.

The spelling of 1940284831 in words is "one billion, nine hundred forty million, two hundred eighty-four thousand, eight hundred thirty-one".