671903232 has 640 divisors, whose sum is σ = 2639831040. Its totient is φ = 145981440.

The previous prime is 671903231. The next prime is 671903261. The reversal of 671903232 is 232309176.

It is a happy number.

It is a hoax number, since the sum of its digits (33) 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 (33).

It is a junction number, because it is equal to n+sod(n) for n = 671903193 and 671903202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671903231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29213173 + ... + 29213195.

It is an arithmetic number, because the mean of its divisors is an integer number (4124736).

Almost surely, 2^671903232 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 671903232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319915520).

671903232 is an abundant number, since it is smaller than the sum of its proper divisors (1967927808).

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

671903232 is a wasteful number, since it uses less digits than its factorization.

671903232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 671903232 is about 25921.0962731131. The cubic root of 671903232 is about 875.8617825756.

The spelling of 671903232 in words is "six hundred seventy-one million, nine hundred three thousand, two hundred thirty-two".