673677810 has 80 divisors (see below), whose sum is σ = 1950817176. Its totient is φ = 165825792.

The previous prime is 673677779. The next prime is 673677811. The reversal of 673677810 is 18776376.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 437102649 + 236575161 = 20907^2 + 15381^2 .

It is a super-2 number, since 2×673677810² = 907683583372792200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (673677811) 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 39 ways as a sum of consecutive naturals, for example, 21459 + ... + 42518.

Almost surely, 2^673677810 is an apocalyptic number.

673677810 is an abundant number, since it is smaller than the sum of its proper divisors (1277139366).

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

673677810 is a wasteful number, since it uses less digits than its factorization.

673677810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64009 (or 64000 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 673677810 is about 25955.3040822102. The cubic root of 673677810 is about 876.6321904899.

The spelling of 673677810 in words is "six hundred seventy-three million, six hundred seventy-seven thousand, eight hundred ten".