1988670 has 32 divisors (see below), whose sum is σ = 4815360. Its totient is φ = 525600.

The previous prime is 1988669. The next prime is 1988671. The reversal of 1988670 is 768891.

It is an interprime number because it is at equal distance from previous prime (1988669) and next prime (1988671).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4311 + ... + 4749.

It is an arithmetic number, because the mean of its divisors is an integer number (150480).

2^1988670 is an apocalyptic number.

1988670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988670 is an abundant number, since it is smaller than the sum of its proper divisors (2826690).

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

1988670 is a wasteful number, since it uses less digits than its factorization.

1988670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1988670 is about 1410.2021131739. The cubic root of 1988670 is about 125.7537392156.

The spelling of 1988670 in words is "one million, nine hundred eighty-eight thousand, six hundred seventy".