158404000 has 72 divisors (see below), whose sum is σ = 391164228. Its totient is φ = 63043200.

The previous prime is 158403989. The next prime is 158404027. The reversal of 158404000 is 404851.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 107081104 + 51322896 = 10348^2 + 7164^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 795901 + ... + 796099.

Almost surely, 2^158404000 is an apocalyptic number.

158404000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195582114).

158404000 is an abundant number, since it is smaller than the sum of its proper divisors (232760228).

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

158404000 is an frugal number, since it uses more digits than its factorization.

158404000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 158404000 is about 12585.8650874701. The cubic root of 158404000 is about 541.0724002039.

Multiplying 158404000 by its product of nonzero digits (640), we get a square (101378560000 = 318400²).

Adding to 158404000 its reverse (404851), we get a palindrome (158808851).

The spelling of 158404000 in words is "one hundred fifty-eight million, four hundred four thousand".