1900324644 has 24 divisors (see below), whose sum is σ = 4586991360. Its totient is φ = 611598624.

The previous prime is 1900324631. The next prime is 1900324649. The reversal of 1900324644 is 4464230091.

It is a super-2 number, since 2×1900324644² = 7222467505187453472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900324649) 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 7 ways as a sum of consecutive naturals, for example, 2730004 + ... + 2730699.

It is an arithmetic number, because the mean of its divisors is an integer number (191124640).

Almost surely, 2^1900324644 is an apocalyptic number.

It is an amenable number.

1900324644 is an abundant number, since it is smaller than the sum of its proper divisors (2686666716).

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

1900324644 is a wasteful number, since it uses less digits than its factorization.

1900324644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460739 (or 5460737 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1900324644 is about 43592.7131984234. The cubic root of 1900324644 is about 1238.6328680389.

The spelling of 1900324644 in words is "one billion, nine hundred million, three hundred twenty-four thousand, six hundred forty-four".