155256784 has 40 divisors (see below), whose sum is σ = 319888008. Its totient is φ = 72744960.

The previous prime is 155256763. The next prime is 155256799. The reversal of 155256784 is 487652551.

It can be written as a sum of positive squares in 4 ways, for example, as 104448400 + 50808384 = 10220^2 + 7128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155256784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68794 + ... + 71014.

Almost surely, 2^155256784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155256784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159944004).

155256784 is an abundant number, since it is smaller than the sum of its proper divisors (164631224).

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

155256784 is a wasteful number, since it uses less digits than its factorization.

155256784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2497 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The square root of 155256784 is about 12460.2080239457. The cubic root of 155256784 is about 537.4650090075.

The spelling of 155256784 in words is "one hundred fifty-five million, two hundred fifty-six thousand, seven hundred eighty-four".