155603040 has 96 divisors (see below), whose sum is σ = 519009120. Its totient is φ = 39051264.

The previous prime is 155603017. The next prime is 155603053. The reversal of 155603040 is 40306551.

It is a tau number, because it is divible by the number of its divisors (96).

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 155603040.

It is a congruent number.

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, 1375 + ... + 17694.

It is an arithmetic number, because the mean of its divisors is an integer number (5406345).

Almost surely, 2^155603040 is an apocalyptic number.

155603040 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 155603040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259504560).

155603040 is an abundant number, since it is smaller than the sum of its proper divisors (363406080).

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

155603040 is a wasteful number, since it uses less digits than its factorization.

155603040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19104 (or 19096 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 155603040 is about 12474.0947567349. The cubic root of 155603040 is about 537.8642665096.

Adding to 155603040 its reverse (40306551), we get a palindrome (195909591).

The spelling of 155603040 in words is "one hundred fifty-five million, six hundred three thousand, forty".