195039040 has 56 divisors (see below), whose sum is σ = 530790912. Its totient is φ = 66869760.

The previous prime is 195039023. The next prime is 195039043. The reversal of 195039040 is 40930591.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 195038993 and 195039011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195039043) 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, 41296 + ... + 45775.

Almost surely, 2^195039040 is an apocalyptic number.

195039040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195039040 is an abundant number, since it is smaller than the sum of its proper divisors (335751872).

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

195039040 is an equidigital number, since it uses as much as digits as its factorization.

195039040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87095 (or 87085 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 195039040 is about 13965.6378300456. The cubic root of 195039040 is about 579.9276960998.

The spelling of 195039040 in words is "one hundred ninety-five million, thirty-nine thousand, forty".