1678670 has 16 divisors (see below), whose sum is σ = 3453408. Its totient is φ = 575520.

The previous prime is 1678657. The next prime is 1678673. The reversal of 1678670 is 768761.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1678670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11921 + ... + 12060.

It is an arithmetic number, because the mean of its divisors is an integer number (215838).

2^1678670 is an apocalyptic number.

1678670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1678670 is an abundant number, since it is smaller than the sum of its proper divisors (1774738).

1678670 is a wasteful number, since it uses less digits than its factorization.

1678670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23995.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1678670 is about 1295.6349794599. The cubic root of 1678670 is about 118.8470600740.

Subtracting from 1678670 its reverse (768761), we obtain a palindrome (909909).

The spelling of 1678670 in words is "one million, six hundred seventy-eight thousand, six hundred seventy".