158229540 has 288 divisors, whose sum is σ = 594397440. Its totient is φ = 33251328.

The previous prime is 158229521. The next prime is 158229541. The reversal of 158229540 is 45922851.

158229540 is a `hidden beast` number, since 1 + 582 + 29 + 54 + 0 = 666.

It is a super-2 number, since 2×158229540² = 50073174657223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 158229495 and 158229504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158229541) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1777816 + ... + 1777904.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^158229540 is an apocalyptic number.

158229540 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 158229540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297198720).

158229540 is an abundant number, since it is smaller than the sum of its proper divisors (436167900).

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

158229540 is a wasteful number, since it uses less digits than its factorization.

158229540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 158229540 is about 12578.9323871305. The cubic root of 158229540 is about 540.8736885411.

The spelling of 158229540 in words is "one hundred fifty-eight million, two hundred twenty-nine thousand, five hundred forty".