43612500 has 72 divisors (see below), whose sum is σ = 127304352. Its totient is φ = 11620000.

The previous prime is 43612489. The next prime is 43612519. The reversal of 43612500 is 521634.

It is a happy number.

43612500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36919 + ... + 38081.

It is an arithmetic number, because the mean of its divisors is an integer number (1768116).

Almost surely, 2^43612500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43612500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63652176).

43612500 is an abundant number, since it is smaller than the sum of its proper divisors (83691852).

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

43612500 is a wasteful number, since it uses less digits than its factorization.

43612500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 43612500 is about 6603.9760750627. The cubic root of 43612500 is about 351.9954049848.

The spelling of 43612500 in words is "forty-three million, six hundred twelve thousand, five hundred".