400195000 has 40 divisors (see below), whose sum is σ = 937668600. Its totient is φ = 160076000.

The previous prime is 400194931. The next prime is 400195001. The reversal of 400195000 is 591004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400195001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35020 + ... + 45019.

It is an arithmetic number, because the mean of its divisors is an integer number (23441715).

Almost surely, 2^400195000 is an apocalyptic number.

400195000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400195000 is an abundant number, since it is smaller than the sum of its proper divisors (537473600).

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

400195000 is an equidigital number, since it uses as much as digits as its factorization.

400195000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80065 (or 80046 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 400195000 is about 20004.8744060042. The cubic root of 400195000 is about 736.9260113008.

The spelling of 400195000 in words is "four hundred million, one hundred ninety-five thousand".