1905420944 has 20 divisors (see below), whose sum is σ = 4219146624. Its totient is φ = 816608928.

The previous prime is 1905420943. The next prime is 1905420971. The reversal of 1905420944 is 4490245091.

It is a super-2 number, since 2×1905420944² = 7261257947667702272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1905420898 and 1905420907.

It is not an unprimeable number, because it can be changed into a prime (1905420943) 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 3 ways as a sum of consecutive naturals, for example, 8506232 + ... + 8506455.

Almost surely, 2^1905420944 is an apocalyptic number.

1905420944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1905420944 is an abundant number, since it is smaller than the sum of its proper divisors (2313725680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1905420944 is a wasteful number, since it uses less digits than its factorization.

1905420944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17012702 (or 17012696 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1905420944 is about 43651.1276372100. The cubic root of 1905420944 is about 1239.7391369393.

The spelling of 1905420944 in words is "one billion, nine hundred five million, four hundred twenty thousand, nine hundred forty-four".