1995491040 has 96 divisors (see below), whose sum is σ = 6559128576. Its totient is φ = 508992000.

The previous prime is 1995491039. The next prime is 1995491053. The reversal of 1995491040 is 401945991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1995490983 and 1995491001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79336 + ... + 101415.

It is an arithmetic number, because the mean of its divisors is an integer number (68324256).

Almost surely, 2^1995491040 is an apocalyptic number.

1995491040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1995491040 is an abundant number, since it is smaller than the sum of its proper divisors (4563637536).

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

1995491040 is a wasteful number, since it uses less digits than its factorization.

1995491040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180792 (or 180784 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1995491040 is about 44670.9193995378. The cubic root of 1995491040 is about 1258.9735152022.

The spelling of 1995491040 in words is "one billion, nine hundred ninety-five million, four hundred ninety-one thousand, forty".