671290368 has 352 divisors, whose sum is σ = 2263818240. Its totient is φ = 172523520.

The previous prime is 671290357. The next prime is 671290369. The reversal of 671290368 is 863092176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671290369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12665830 + ... + 12665882.

Almost surely, 2^671290368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671290368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131909120).

671290368 is an abundant number, since it is smaller than the sum of its proper divisors (1592527872).

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

671290368 is a wasteful number, since it uses less digits than its factorization.

671290368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 671290368 is about 25909.2718539136. The cubic root of 671290368 is about 875.5954012384.

The spelling of 671290368 in words is "six hundred seventy-one million, two hundred ninety thousand, three hundred sixty-eight".