158331420 has 144 divisors (see below), whose sum is σ = 525051072. Its totient is φ = 38384640.

The previous prime is 158331409. The next prime is 158331469. The reversal of 158331420 is 24133851.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165664 + ... + 166616.

It is an arithmetic number, because the mean of its divisors is an integer number (3646188).

Almost surely, 2^158331420 is an apocalyptic number.

158331420 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 158331420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262525536).

158331420 is an abundant number, since it is smaller than the sum of its proper divisors (366719652).

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

158331420 is a wasteful number, since it uses less digits than its factorization.

158331420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 158331420 is about 12582.9813637309. The cubic root of 158331420 is about 540.9897485994.

The spelling of 158331420 in words is "one hundred fifty-eight million, three hundred thirty-one thousand, four hundred twenty".