155791244 has 24 divisors (see below), whose sum is σ = 321635328. Its totient is φ = 64613520.

The previous prime is 155791243. The next prime is 155791261. The reversal of 155791244 is 442197551.

It is a junction number, because it is equal to n+sod(n) for n = 155791198 and 155791207.

It is not an unprimeable number, because it can be changed into a prime (155791243) 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 7 ways as a sum of consecutive naturals, for example, 88874 + ... + 90609.

It is an arithmetic number, because the mean of its divisors is an integer number (13401472).

Almost surely, 2^155791244 is an apocalyptic number.

155791244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155791244 is an abundant number, since it is smaller than the sum of its proper divisors (165844084).

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

155791244 is a wasteful number, since it uses less digits than its factorization.

155791244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179525 (or 179523 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 155791244 is about 12481.6362709382. The cubic root of 155791244 is about 538.0810305298.

The spelling of 155791244 in words is "one hundred fifty-five million, seven hundred ninety-one thousand, two hundred forty-four".