158580990 has 160 divisors (see below), whose sum is σ = 454243680. Its totient is φ = 39626496.

The previous prime is 158580943. The next prime is 158581013. The reversal of 158580990 is 99085851.

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

It is a congruent number.

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, 1009992 + ... + 1010148.

It is an arithmetic number, because the mean of its divisors is an integer number (2839023).

Almost surely, 2^158580990 is an apocalyptic number.

158580990 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 158580990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227121840).

158580990 is an abundant number, since it is smaller than the sum of its proper divisors (295662690).

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

158580990 is a wasteful number, since it uses less digits than its factorization.

158580990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 158580990 is about 12592.8944250319. The cubic root of 158580990 is about 541.2738445262.

The spelling of 158580990 in words is "one hundred fifty-eight million, five hundred eighty thousand, nine hundred ninety".