615880 has 32 divisors (see below), whose sum is σ = 1409400. Its totient is φ = 242176.

The previous prime is 615869. The next prime is 615883. The reversal of 615880 is 88516.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 88804 = 726^2 + 298^2 .

It is not an unprimeable number, because it can be changed into a prime (615883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3474 + ... + 3646.

2⁶¹⁵⁸⁸⁰ 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 615880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704700).

615880 is an abundant number, since it is smaller than the sum of its proper divisors (793520).

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

615880 is a wasteful number, since it uses less digits than its factorization.

615880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 615880 is about 784.7802240118. The cubic root of 615880 is about 85.0808918515.

The spelling of 615880 in words is "six hundred fifteen thousand, eight hundred eighty".