43750000 has 90 divisors (see below), whose sum is σ = 121093688. Its totient is φ = 15000000.

The previous prime is 43749973. The next prime is 43750013. The reversal of 43750000 is 5734.

It is a nialpdrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 43750000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6249997 + ... + 6250003.

Almost surely, 2^43750000 is an apocalyptic number.

43750000 is a gapful number since it is divisible by the number (40) 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 43750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60546844).

43750000 is an abundant number, since it is smaller than the sum of its proper divisors (77343688).

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

43750000 is an frugal number, since it uses more digits than its factorization.

43750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 43750000 is about 6614.3782776615. The cubic root of 43750000 is about 352.3649366032.

Adding to 43750000 its reverse (5734), we get a palindrome (43755734).

The spelling of 43750000 in words is "forty-three million, seven hundred fifty thousand".