671039028 has 72 divisors (see below), whose sum is σ = 1959310080. Its totient is φ = 191381760.

The previous prime is 671039023. The next prime is 671039063. The reversal of 671039028 is 820930176.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 671038983 and 671039001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671039021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43108 + ... + 56571.

It is an arithmetic number, because the mean of its divisors is an integer number (27212640).

Almost surely, 2^671039028 is an apocalyptic number.

671039028 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

671039028 is an abundant number, since it is smaller than the sum of its proper divisors (1288271052).

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

671039028 is a wasteful number, since it uses less digits than its factorization.

671039028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99717 (or 99712 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 671039028 is about 25904.4210126380. The cubic root of 671039028 is about 875.4861094275.

The spelling of 671039028 in words is "six hundred seventy-one million, thirty-nine thousand, twenty-eight".