671213400 has 192 divisors, whose sum is σ = 2444843520. Its totient is φ = 150182400.

The previous prime is 671213371. The next prime is 671213401. The reversal of 671213400 is 4312176.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671213401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81889 + ... + 89711.

It is an arithmetic number, because the mean of its divisors is an integer number (12733560).

Almost surely, 2^671213400 is an apocalyptic number.

671213400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671213400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222421760).

671213400 is an abundant number, since it is smaller than the sum of its proper divisors (1773630120).

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

671213400 is a wasteful number, since it uses less digits than its factorization.

671213400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866 (or 7857 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 671213400 is about 25907.7864743401. The cubic root of 671213400 is about 875.5619356395.

Adding to 671213400 its reverse (4312176), we get a palindrome (675525576).

The spelling of 671213400 in words is "six hundred seventy-one million, two hundred thirteen thousand, four hundred".