158949540 has 120 divisors (see below), whose sum is σ = 507386880. Its totient is φ = 41643072.

The previous prime is 158949533. The next prime is 158949547. The reversal of 158949540 is 45949851.

158949540 is a `hidden beast` number, since 15 + 8 + 94 + 9 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (158949533) and next prime (158949547).

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

It is not an unprimeable number, because it can be changed into a prime (158949547) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 94749 + ... + 96411.

It is an arithmetic number, because the mean of its divisors is an integer number (4228224).

Almost surely, 2^158949540 is an apocalyptic number.

158949540 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 158949540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253693440).

158949540 is an abundant number, since it is smaller than the sum of its proper divisors (348437340).

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

158949540 is a wasteful number, since it uses less digits than its factorization.

158949540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 158949540 is about 12607.5191849943. The cubic root of 158949540 is about 541.6928357640.

The spelling of 158949540 in words is "one hundred fifty-eight million, nine hundred forty-nine thousand, five hundred forty".