155644384 has 72 divisors (see below), whose sum is σ = 377485920. Its totient is φ = 62770176.

The previous prime is 155644373. The next prime is 155644387. The reversal of 155644384 is 483446551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155644387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23737 + ... + 29575.

It is an arithmetic number, because the mean of its divisors is an integer number (5242860).

Almost surely, 2^155644384 is an apocalyptic number.

155644384 is a gapful number since it is divisible by the number (14) 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 155644384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188742960).

155644384 is an abundant number, since it is smaller than the sum of its proper divisors (221841536).

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

155644384 is a wasteful number, since it uses less digits than its factorization.

155644384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880 (or 5865 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The square root of 155644384 is about 12475.7518410715. The cubic root of 155644384 is about 537.9118994501.

The spelling of 155644384 in words is "one hundred fifty-five million, six hundred forty-four thousand, three hundred eighty-four".