1896944640 has 88 divisors (see below), whose sum is σ = 6067308000. Its totient is φ = 505847808.

The previous prime is 1896944593. The next prime is 1896944641. The reversal of 1896944640 is 464496981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896944641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46390 + ... + 77109.

Almost surely, 2^1896944640 is an apocalyptic number.

1896944640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1896944640 is an abundant number, since it is smaller than the sum of its proper divisors (4170363360).

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

1896944640 is a wasteful number, since it uses less digits than its factorization.

1896944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123527 (or 123509 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1896944640 is about 43553.9279514489. The cubic root of 1896944640 is about 1237.8980692653.

The spelling of 1896944640 in words is "one billion, eight hundred ninety-six million, nine hundred forty-four thousand, six hundred forty".