400000158 has 24 divisors (see below), whose sum is σ = 867035208. Its totient is φ = 133276752.

The previous prime is 400000151. The next prime is 400000171. The reversal of 400000158 is 851000004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 400000158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78216 + ... + 83172.

It is an arithmetic number, because the mean of its divisors is an integer number (36126467).

Almost surely, 2^400000158 is an apocalyptic number.

400000158 is an abundant number, since it is smaller than the sum of its proper divisors (467035050).

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

400000158 is a wasteful number, since it uses less digits than its factorization.

400000158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448 (or 9445 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 400000158 is about 20000.0039499996. The cubic root of 400000158 is about 736.8063967409.

The spelling of 400000158 in words is "four hundred million, one hundred fifty-eight", and thus it is an aban number.