1995315840 has 768 divisors, whose sum is σ = 8661219840. Its totient is φ = 412876800.

The previous prime is 1995315827. The next prime is 1995315851. The reversal of 1995315840 is 485135991.

1995315840 is a `hidden beast` number, since 19 + 9 + 53 + 1 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28103005 + ... + 28103075.

It is an arithmetic number, because the mean of its divisors is an integer number (11277630).

Almost surely, 2^1995315840 is an apocalyptic number.

1995315840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995315840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4330609920).

1995315840 is an abundant number, since it is smaller than the sum of its proper divisors (6665904000).

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

1995315840 is a wasteful number, since it uses less digits than its factorization.

1995315840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1995315840 is about 44668.9583491713. The cubic root of 1995315840 is about 1258.9366690307.

The spelling of 1995315840 in words is "one billion, nine hundred ninety-five million, three hundred fifteen thousand, eight hundred forty".