43620864 has 80 divisors (see below), whose sum is σ = 132842688. Its totient is φ = 12460032.

The previous prime is 43620859. The next prime is 43620869. The reversal of 43620864 is 46802634.

It is an interprime number because it is at equal distance from previous prime (43620859) and next prime (43620869).

It is a super-2 number, since 2×43620864² = 3805559552212992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43620869) 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, 8724 + ... + 12780.

Almost surely, 2^43620864 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 43620864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66421344).

43620864 is an abundant number, since it is smaller than the sum of its proper divisors (89221824).

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

43620864 is an equidigital number, since it uses as much as digits as its factorization.

43620864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 43620864 is about 6604.6092995725. The cubic root of 43620864 is about 352.0179054253.

The spelling of 43620864 in words is "forty-three million, six hundred twenty thousand, eight hundred sixty-four".