1670688 has 36 divisors (see below), whose sum is σ = 4751838. Its totient is φ = 556800.

The previous prime is 1670687. The next prime is 1670717. The reversal of 1670688 is 8860761.

It can be written as a sum of positive squares in only one way, i.e., 944784 + 725904 = 972^2 + 852^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1670687) 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, 2613 + ... + 3188.

2^1670688 is an apocalyptic number.

1670688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1670688 is an abundant number, since it is smaller than the sum of its proper divisors (3081150).

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

1670688 is a wasteful number, since it uses less digits than its factorization.

1670688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817 (or 5806 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1670688 is about 1292.5509661131. The cubic root of 1670688 is about 118.6583899178.

The spelling of 1670688 in words is "one million, six hundred seventy thousand, six hundred eighty-eight".