671033440 has 288 divisors, whose sum is σ = 2084963328. Its totient is φ = 201600000.

The previous prime is 671033423. The next prime is 671033453. The reversal of 671033440 is 44330176.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 671033399 and 671033408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2673315 + ... + 2673565.

It is an arithmetic number, because the mean of its divisors is an integer number (7239456).

Almost surely, 2^671033440 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 671033440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042481664).

671033440 is an abundant number, since it is smaller than the sum of its proper divisors (1413929888).

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

671033440 is a wasteful number, since it uses less digits than its factorization.

671033440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 671033440 is about 25904.3131543764. The cubic root of 671033440 is about 875.4836792510.

The spelling of 671033440 in words is "six hundred seventy-one million, thirty-three thousand, four hundred forty".