43225440 has 48 divisors (see below), whose sum is σ = 136161648. Its totient is φ = 11526656.

The previous prime is 43225409. The next prime is 43225453. The reversal of 43225440 is 4452234.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a self number, because there is not a number n which added to its sum of digits gives 43225440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44547 + ... + 45506.

It is an arithmetic number, because the mean of its divisors is an integer number (2836701).

Almost surely, 2^43225440 is an apocalyptic number.

43225440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43225440 is an abundant number, since it is smaller than the sum of its proper divisors (92936208).

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

43225440 is a wasteful number, since it uses less digits than its factorization.

43225440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90071 (or 90063 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 43225440 is about 6574.6056915985. The cubic root of 43225440 is about 350.9509919320.

Adding to 43225440 its reverse (4452234), we get a palindrome (47677674).

The spelling of 43225440 in words is "forty-three million, two hundred twenty-five thousand, four hundred forty".