155330040 has 128 divisors (see below), whose sum is σ = 490613760. Its totient is φ = 39266304.

The previous prime is 155329987. The next prime is 155330051. The reversal of 155330040 is 40033551.

It is a junction number, because it is equal to n+sod(n) for n = 155329989 and 155330016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460752 + ... + 461088.

It is an arithmetic number, because the mean of its divisors is an integer number (3832920).

Almost surely, 2^155330040 is an apocalyptic number.

155330040 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 155330040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245306880).

155330040 is an abundant number, since it is smaller than the sum of its proper divisors (335283720).

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

155330040 is a wasteful number, since it uses less digits than its factorization.

155330040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 155330040 is about 12463.1472750666. The cubic root of 155330040 is about 537.5495277960.

Adding to 155330040 its reverse (40033551), we get a palindrome (195363591).

The spelling of 155330040 in words is "one hundred fifty-five million, three hundred thirty thousand, forty".