155444040 has 96 divisors (see below), whose sum is σ = 515998080. Its totient is φ = 40565376.

The previous prime is 155444027. The next prime is 155444077. The reversal of 155444040 is 40444551.

It is a junction number, because it is equal to n+sod(n) for n = 155443995 and 155444013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12327 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (5374980).

Almost surely, 2^155444040 is an apocalyptic number.

155444040 is a gapful number since it is divisible by the number (10) 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 155444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257999040).

155444040 is an abundant number, since it is smaller than the sum of its proper divisors (360554040).

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

155444040 is a wasteful number, since it uses less digits than its factorization.

155444040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9251 (or 9244 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 155444040 is about 12467.7199198570. The cubic root of 155444040 is about 537.6810019580.

Adding to 155444040 its reverse (40444551), we get a palindrome (195888591).

The spelling of 155444040 in words is "one hundred fifty-five million, four hundred forty-four thousand, forty".