1676640 has 96 divisors (see below), whose sum is σ = 6048000. Its totient is φ = 382464.

The previous prime is 1676629. The next prime is 1676641. The reversal of 1676640 is 466761.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1676640² = 5622243379200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1676598 and 1676607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1676641) 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, 3111 + ... + 3609.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2^1676640 is an apocalyptic number.

1676640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1676640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3024000).

1676640 is an abundant number, since it is smaller than the sum of its proper divisors (4371360).

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

1676640 is a wasteful number, since it uses less digits than its factorization.

1676640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1676640 is about 1294.8513428189. The cubic root of 1676640 is about 118.7991338689.

The spelling of 1676640 in words is "one million, six hundred seventy-six thousand, six hundred forty".