158378490 has 160 divisors (see below), whose sum is σ = 461039040. Its totient is φ = 38880000.

The previous prime is 158378459. The next prime is 158378551. The reversal of 158378490 is 94873851.

158378490 is a `hidden beast` number, since 15 + 83 + 78 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 630865 + ... + 631115.

It is an arithmetic number, because the mean of its divisors is an integer number (2881494).

Almost surely, 2^158378490 is an apocalyptic number.

158378490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158378490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230519520).

158378490 is an abundant number, since it is smaller than the sum of its proper divisors (302660550).

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

158378490 is a wasteful number, since it uses less digits than its factorization.

158378490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 158378490 is about 12584.8516081835. The cubic root of 158378490 is about 541.0433531723.

The spelling of 158378490 in words is "one hundred fifty-eight million, three hundred seventy-eight thousand, four hundred ninety".