1670490 has 64 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 424512.

The previous prime is 1670489. The next prime is 1670491. The reversal of 1670490 is 940761.

It is an interprime number because it is at equal distance from previous prime (1670489) and next prime (1670491).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1670491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6076 + ... + 6344.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2^1670490 is an apocalyptic number.

1670490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1670490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332800).

1670490 is an abundant number, since it is smaller than the sum of its proper divisors (2995110).

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

1670490 is a wasteful number, since it uses less digits than its factorization.

1670490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1670490 is about 1292.4743711192. The cubic root of 1670490 is about 118.6537021705.

The spelling of 1670490 in words is "one million, six hundred seventy thousand, four hundred ninety".