615428 has 24 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 274400.

The previous prime is 615427. The next prime is 615431. The reversal of 615428 is 824516.

It is a junction number, because it is equal to n+sod(n) for n = 615397 and 615406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615428.

It is not an unprimeable number, because it can be changed into a prime (615427) 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, 3026 + ... + 3222.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁶¹⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

615428 is a deficient number, since it is larger than the sum of its proper divisors (582076).

615428 is a wasteful number, since it uses less digits than its factorization.

615428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 281 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 615428 is about 784.4921924404. The cubic root of 615428 is about 85.0600728744.

The spelling of 615428 in words is "six hundred fifteen thousand, four hundred twenty-eight".