1995775440 has 40 divisors (see below), whose sum is σ = 6186904608. Its totient is φ = 532206720.

The previous prime is 1995775399. The next prime is 1995775489. The reversal of 1995775440 is 445775991.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4157626 + ... + 4158105.

Almost surely, 2^1995775440 is an apocalyptic number.

1995775440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995775440 is an abundant number, since it is smaller than the sum of its proper divisors (4191129168).

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

1995775440 is a wasteful number, since it uses less digits than its factorization.

1995775440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315747 (or 8315741 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 51.

The square root of 1995775440 is about 44674.1025651327. The cubic root of 1995775440 is about 1259.0333225465.

The spelling of 1995775440 in words is "one billion, nine hundred ninety-five million, seven hundred seventy-five thousand, four hundred forty".