1678604 has 6 divisors (see below), whose sum is σ = 2937564. Its totient is φ = 839300.

The previous prime is 1678603. The next prime is 1678613. The reversal of 1678604 is 4068761.

It is a super-2 number, since 2×1678604² = 5635422777632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1678601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209822 + ... + 209829.

It is an arithmetic number, because the mean of its divisors is an integer number (489594).

2^1678604 is an apocalyptic number.

It is an amenable number.

1678604 is a deficient number, since it is larger than the sum of its proper divisors (1258960).

1678604 is a wasteful number, since it uses less digits than its factorization.

1678604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419655 (or 419653 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1678604 is about 1295.6095090729. The cubic root of 1678604 is about 118.8455024900.

The spelling of 1678604 in words is "one million, six hundred seventy-eight thousand, six hundred four".