1673644 has 18 divisors (see below), whose sum is σ = 3407460. Its totient is φ = 717192.

The previous prime is 1673629. The next prime is 1673663. The reversal of 1673644 is 4463761.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4074 + ... + 4465.

2^1673644 is an apocalyptic number.

1673644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1673644 is an abundant number, since it is smaller than the sum of its proper divisors (1733816).

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

1673644 is a wasteful number, since it uses less digits than its factorization.

1673644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8557 (or 8548 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 1673644 is about 1293.6939359833. The cubic root of 1673644 is about 118.7283306721.

The spelling of 1673644 in words is "one million, six hundred seventy-three thousand, six hundred forty-four".