1618428 has 24 divisors (see below), whose sum is σ = 4316032. Its totient is φ = 462384.

The previous prime is 1618411. The next prime is 1618433. The reversal of 1618428 is 8248161.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1618395 and 1618404.

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, 9550 + ... + 9717.

2^1618428 is an apocalyptic number.

It is an amenable number.

1618428 is an abundant number, since it is smaller than the sum of its proper divisors (2697604).

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

1618428 is a wasteful number, since it uses less digits than its factorization.

1618428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19281 (or 19279 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 1618428 is about 1272.1745163302. The cubic root of 1618428 is about 117.4080282251.

The spelling of 1618428 in words is "one million, six hundred eighteen thousand, four hundred twenty-eight".