434640 has 40 divisors (see below), whose sum is σ = 1348128. Its totient is φ = 115840.

The previous prime is 434611. The next prime is 434647. The reversal of 434640 is 46434.

434640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434647) by changing a digit.

434640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666 + ... + 1145.

2⁴³⁴⁶⁴⁰ is an apocalyptic number.

434640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

434640 is an abundant number, since it is smaller than the sum of its proper divisors (913488).

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

434640 is a wasteful number, since it uses less digits than its factorization.

434640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 434640 is about 659.2723261293. The cubic root of 434640 is about 75.7489407208.

The spelling of 434640 in words is "four hundred thirty-four thousand, six hundred forty".