155252040 has 128 divisors (see below), whose sum is σ = 494640000. Its totient is φ = 38873088.

The previous prime is 155252033. The next prime is 155252057. The reversal of 155252040 is 40252551.

It is a happy number.

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 155252040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339492 + ... + 339948.

It is an arithmetic number, because the mean of its divisors is an integer number (3864375).

Almost surely, 2^155252040 is an apocalyptic number.

155252040 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 155252040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247320000).

155252040 is an abundant number, since it is smaller than the sum of its proper divisors (339387960).

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

155252040 is a wasteful number, since it uses less digits than its factorization.

155252040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 155252040 is about 12460.0176564883. The cubic root of 155252040 is about 537.4595347218.

The spelling of 155252040 in words is "one hundred fifty-five million, two hundred fifty-two thousand, forty".