1672640 has 28 divisors (see below), whose sum is σ = 3983736. Its totient is φ = 668928.

The previous prime is 1672639. The next prime is 1672651. The reversal of 1672640 is 462761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294 + ... + 2933.

2^1672640 is an apocalyptic number.

1672640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1672640 is an abundant number, since it is smaller than the sum of its proper divisors (2311096).

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

1672640 is an equidigital number, since it uses as much as digits as its factorization.

1672640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244 (or 5234 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1672640 is about 1293.3058416322. The cubic root of 1672640 is about 118.7045846647.

The spelling of 1672640 in words is "one million, six hundred seventy-two thousand, six hundred forty".