1900047438 has 24 divisors (see below), whose sum is σ = 4128579000. Its totient is φ = 631532304.

The previous prime is 1900047419. The next prime is 1900047463. The reversal of 1900047438 is 8347400091.

It is a happy number.

It is a super-2 number, since 2×1900047438² = 7220360533300727688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 144948 + ... + 157511.

It is an arithmetic number, because the mean of its divisors is an integer number (172024125).

Almost surely, 2^1900047438 is an apocalyptic number.

1900047438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1900047438 is an abundant number, since it is smaller than the sum of its proper divisors (2228531562).

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

1900047438 is a wasteful number, since it uses less digits than its factorization.

1900047438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302816 (or 302813 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1900047438 is about 43589.5335831894. The cubic root of 1900047438 is about 1238.5726374251.

The spelling of 1900047438 in words is "one billion, nine hundred million, forty-seven thousand, four hundred thirty-eight".