43421620 has 24 divisors (see below), whose sum is σ = 99475488. Its totient is φ = 15789600.

The previous prime is 43421603. The next prime is 43421627. The reversal of 43421620 is 2612434.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 43421591 and 43421600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98466 + ... + 98905.

It is an arithmetic number, because the mean of its divisors is an integer number (4144812).

Almost surely, 2^43421620 is an apocalyptic number.

It is an amenable number.

43421620 is an abundant number, since it is smaller than the sum of its proper divisors (56053868).

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

43421620 is a wasteful number, since it uses less digits than its factorization.

43421620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197391 (or 197389 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 43421620 is about 6589.5083276372. The cubic root of 43421620 is about 351.4811247180.

The spelling of 43421620 in words is "forty-three million, four hundred twenty-one thousand, six hundred twenty".