615944 has 32 divisors (see below), whose sum is σ = 1399680. Its totient is φ = 248064.

The previous prime is 615941. The next prime is 615949. The reversal of 615944 is 449516.

615944 = T₄₁₆ + T₄₁₇ + ... + T₄₂₂.

It is a super-2 number, since 2×615944² = 758774022272, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (615941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2⁶¹⁵⁹⁴⁴ 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 615944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699840).

615944 is an abundant number, since it is smaller than the sum of its proper divisors (783736).

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

615944 is a wasteful number, since it uses less digits than its factorization.

615944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 673 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 615944 is about 784.8209986997. The cubic root of 615944 is about 85.0838388479.

The spelling of 615944 in words is "six hundred fifteen thousand, nine hundred forty-four".