400195494 has 24 divisors (see below), whose sum is σ = 868561200. Its totient is φ = 133172208.

The previous prime is 400195493. The next prime is 400195507. The reversal of 400195494 is 494591004.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400195493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7777 + ... + 29340.

It is an arithmetic number, because the mean of its divisors is an integer number (36190050).

Almost surely, 2^400195494 is an apocalyptic number.

400195494 is an abundant number, since it is smaller than the sum of its proper divisors (468365706).

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

400195494 is a wasteful number, since it uses less digits than its factorization.

400195494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37724 (or 37721 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 400195494 is about 20004.8867529911. The cubic root of 400195494 is about 736.9263145207.

It can be divided in two parts, 400195 and 494, that added together give a square (400689 = 633²).

The spelling of 400195494 in words is "four hundred million, one hundred ninety-five thousand, four hundred ninety-four".