1679620 has 24 divisors (see below), whose sum is σ = 3558744. Its totient is φ = 665856.

The previous prime is 1679609. The next prime is 1679627. The reversal of 1679620 is 269761.

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 1679616 = 2^2 + 1296^2 .

It is a super-2 number, since 2×1679620² = 5642246688800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (148281).

2^1679620 is an apocalyptic number.

1679620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1679620 is an abundant number, since it is smaller than the sum of its proper divisors (1879124).

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

1679620 is a wasteful number, since it uses less digits than its factorization.

1679620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1679620 is about 1296.0015432090. The cubic root of 1679620 is about 118.8694753225.

The spelling of 1679620 in words is "one million, six hundred seventy-nine thousand, six hundred twenty".