155304240 has 240 divisors, whose sum is σ = 596890368. Its totient is φ = 32707584.

The previous prime is 155304223. The next prime is 155304263. The reversal of 155304240 is 42403551.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 155304240.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283647 + ... + 284193.

Almost surely, 2^155304240 is an apocalyptic number.

155304240 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 155304240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298445184).

155304240 is an abundant number, since it is smaller than the sum of its proper divisors (441586128).

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

155304240 is a wasteful number, since it uses less digits than its factorization.

155304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155304240 is about 12462.1121805254. The cubic root of 155304240 is about 537.5197641912.

Adding to 155304240 its reverse (42403551), we get a palindrome (197707791).

The spelling of 155304240 in words is "one hundred fifty-five million, three hundred four thousand, two hundred forty".