1605428 has 36 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 699600.

The previous prime is 1605427. The next prime is 1605431. The reversal of 1605428 is 8245061.

It is a junction number, because it is equal to n+sod(n) for n = 1605397 and 1605406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14951 + ... + 15057.

It is an arithmetic number, because the mean of its divisors is an integer number (89376).

2^1605428 is an apocalyptic number.

It is an amenable number.

1605428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1605428 is a wasteful number, since it uses less digits than its factorization.

1605428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 151 counting only the distinct ones).

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

The square root of 1605428 is about 1267.0548527984. The cubic root of 1605428 is about 117.0928233113.

The spelling of 1605428 in words is "one million, six hundred five thousand, four hundred twenty-eight".