1995405880 has 32 divisors (see below), whose sum is σ = 4835023200. Its totient is φ = 736765056.

The previous prime is 1995405877. The next prime is 1995405883. The reversal of 1995405880 is 885045991.

It is an interprime number because it is at equal distance from previous prime (1995405877) and next prime (1995405883).

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995405883) 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, 1918140 + ... + 1919179.

It is an arithmetic number, because the mean of its divisors is an integer number (151094475).

Almost surely, 2^1995405880 is an apocalyptic number.

1995405880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995405880 is an abundant number, since it is smaller than the sum of its proper divisors (2839617320).

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

1995405880 is a wasteful number, since it uses less digits than its factorization.

1995405880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837343 (or 3837339 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1995405880 is about 44669.9661965397. The cubic root of 1995405880 is about 1258.9556055403.

The spelling of 1995405880 in words is "one billion, nine hundred ninety-five million, four hundred five thousand, eight hundred eighty".