1606428 has 18 divisors (see below), whose sum is σ = 4060784. Its totient is φ = 535464.

The previous prime is 1606427. The next prime is 1606433. The reversal of 1606428 is 8246061.

1606428 is a `hidden beast` number, since 16 + 0 + 642 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1606428² = 5161221838368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22276 + ... + 22347.

2^1606428 is an apocalyptic number.

1606428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1606428 is an abundant number, since it is smaller than the sum of its proper divisors (2454356).

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

1606428 is a wasteful number, since it uses less digits than its factorization.

1606428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44633 (or 44628 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1606428 is about 1267.4494072743. The cubic root of 1606428 is about 117.1171301254.

The spelling of 1606428 in words is "one million, six hundred six thousand, four hundred twenty-eight".