1670998 has 36 divisors (see below), whose sum is σ = 3149820. Its totient is φ = 662592.

The previous prime is 1670983. The next prime is 1671041. The reversal of 1670998 is 8990761.

It is a self number, because there is not a number n which added to its sum of digits gives 1670998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28293 + ... + 28351.

It is an arithmetic number, because the mean of its divisors is an integer number (87495).

2^1670998 is an apocalyptic number.

1670998 is a deficient number, since it is larger than the sum of its proper divisors (1478822).

1670998 is a wasteful number, since it uses less digits than its factorization.

1670998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1670998 is about 1292.6708784528. The cubic root of 1670998 is about 118.6657285762.

It can be divided in two parts, 16709 and 98, that added together give a 5-th power (16807 = 7⁵).

The spelling of 1670998 in words is "one million, six hundred seventy thousand, nine hundred ninety-eight".