641400 has 48 divisors (see below), whose sum is σ = 1990200. Its totient is φ = 170880.

The previous prime is 641387. The next prime is 641411. The reversal of 641400 is 4146.

641400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641400² = 822787920000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 641400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66 + ... + 1134.

2⁶⁴¹⁴⁰⁰ is an apocalyptic number.

641400 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 641400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995100).

641400 is an abundant number, since it is smaller than the sum of its proper divisors (1348800).

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

641400 is a wasteful number, since it uses less digits than its factorization.

641400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 641400 is about 800.8745220070. The cubic root of 641400 is about 86.2401795162.

Adding to 641400 its reverse (4146), we get a palindrome (645546).

The spelling of 641400 in words is "six hundred forty-one thousand, four hundred".