155149984 has 48 divisors (see below), whose sum is σ = 334406016. Its totient is φ = 70272000.

The previous prime is 155149979. The next prime is 155149987. The reversal of 155149984 is 489941551.

It is a happy number.

155149984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (155149987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128584 + ... + 129784.

It is an arithmetic number, because the mean of its divisors is an integer number (6966792).

Almost surely, 2^155149984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155149984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167203008).

155149984 is an abundant number, since it is smaller than the sum of its proper divisors (179256032).

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

155149984 is a wasteful number, since it uses less digits than its factorization.

155149984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1581 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The square root of 155149984 is about 12455.9216439411. The cubic root of 155149984 is about 537.3417413291.

The spelling of 155149984 in words is "one hundred fifty-five million, one hundred forty-nine thousand, nine hundred eighty-four".