1615328 has 48 divisors (see below), whose sum is σ = 3746736. Its totient is φ = 675840.

The previous prime is 1615307. The next prime is 1615331. The reversal of 1615328 is 8235161.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 1615297 and 1615306.

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, 4400 + ... + 4752.

It is an arithmetic number, because the mean of its divisors is an integer number (78057).

2^1615328 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 1615328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1873368).

1615328 is an abundant number, since it is smaller than the sum of its proper divisors (2131408).

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

1615328 is a wasteful number, since it uses less digits than its factorization.

1615328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 379 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 1615328 is about 1270.9555460361. The cubic root of 1615328 is about 117.3330176759. Note that the first 3 decimals are identical.

1615328 divided by its sum of digits (26) gives a triangular number (62128 = T₃₅₂).

The spelling of 1615328 in words is "one million, six hundred fifteen thousand, three hundred twenty-eight".