155489712 has 80 divisors (see below), whose sum is σ = 470303232. Its totient is φ = 43338240.

The previous prime is 155489693. The next prime is 155489717. The reversal of 155489712 is 217984551.

It is a super-3 number, since 3×155489712³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (155489717) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8133 + ... + 19419.

Almost surely, 2^155489712 is an apocalyptic number.

155489712 is a gapful number since it is divisible by the number (12) 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 155489712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235151616).

155489712 is an abundant number, since it is smaller than the sum of its proper divisors (314813520).

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

155489712 is a wasteful number, since it uses less digits than its factorization.

155489712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11346 (or 11340 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 155489712 is about 12469.5513952989. The cubic root of 155489712 is about 537.7336566241.

The spelling of 155489712 in words is "one hundred fifty-five million, four hundred eighty-nine thousand, seven hundred twelve".