1900643732 has 48 divisors (see below), whose sum is σ = 3744703872. Its totient is φ = 837513600.

The previous prime is 1900643729. The next prime is 1900643737. The reversal of 1900643732 is 2373460091.

It is a super-2 number, since 2×1900643732² = 7224893191981775648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900643692 and 1900643701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900643737) 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, 837263 + ... + 839529.

It is an arithmetic number, because the mean of its divisors is an integer number (78014664).

Almost surely, 2^1900643732 is an apocalyptic number.

It is an amenable number.

1900643732 is a deficient number, since it is larger than the sum of its proper divisors (1844060140).

1900643732 is a wasteful number, since it uses less digits than its factorization.

With its successor (1900643733) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (3006).

With its successor (1900643733) it forms an eRAP, since the sums of their prime factors are consecutive (3008 and 3009).

1900643732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008 (or 3006 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 1900643732 is about 43596.3729225265. The cubic root of 1900643732 is about 1238.7021914159.

The spelling of 1900643732 in words is "one billion, nine hundred million, six hundred forty-three thousand, seven hundred thirty-two".