155303040 has 128 divisors (see below), whose sum is σ = 505854720. Its totient is φ = 40509440.

The previous prime is 155303021. The next prime is 155303081. The reversal of 155303040 is 40303551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 155302998 and 155303016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89380 + ... + 91100.

It is an arithmetic number, because the mean of its divisors is an integer number (3951990).

Almost surely, 2^155303040 is an apocalyptic number.

155303040 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 155303040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252927360).

155303040 is an abundant number, since it is smaller than the sum of its proper divisors (350551680).

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

155303040 is a wasteful number, since it uses less digits than its factorization.

155303040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1778 counting only the distinct ones).

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

The square root of 155303040 is about 12462.0640345009. The cubic root of 155303040 is about 537.5183797573.

Adding to 155303040 its reverse (40303551), we get a palindrome (195606591).

The spelling of 155303040 in words is "one hundred fifty-five million, three hundred three thousand, forty".