155989144 has 32 divisors (see below), whose sum is σ = 320371200. Its totient is φ = 70873600.

The previous prime is 155989111. The next prime is 155989153. The reversal of 155989144 is 441989551.

It is a happy number.

It is a super-2 number, since 2×155989144² = 48665226091705472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155989094 and 155989103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15832 + ... + 23719.

It is an arithmetic number, because the mean of its divisors is an integer number (10011600).

Almost surely, 2^155989144 is an apocalyptic number.

It is an amenable number.

155989144 is an abundant number, since it is smaller than the sum of its proper divisors (164382056).

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

155989144 is a wasteful number, since it uses less digits than its factorization.

155989144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39603 (or 39599 counting only the distinct ones).

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

The square root of 155989144 is about 12489.5614014264. The cubic root of 155989144 is about 538.3087737062.

It can be divided in two parts, 15598 and 9144, that added together give a palindrome (24742).

The spelling of 155989144 in words is "one hundred fifty-five million, nine hundred eighty-nine thousand, one hundred forty-four".