43390464 has 160 divisors (see below), whose sum is σ = 129929184. Its totient is φ = 12779520.

The previous prime is 43390349. The next prime is 43390469. The reversal of 43390464 is 46409334.

It is a super-2 number, since 2×43390464² = 3765464732270592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43390469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818662 + ... + 818714.

Almost surely, 2^43390464 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 43390464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64964592).

43390464 is an abundant number, since it is smaller than the sum of its proper divisors (86538720).

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

43390464 is a wasteful number, since it uses less digits than its factorization.

43390464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 43390464 is about 6587.1438423645. The cubic root of 43390464 is about 351.3970393699.

Adding to 43390464 its reverse (46409334), we get a palindrome (89799798).

The spelling of 43390464 in words is "forty-three million, three hundred ninety thousand, four hundred sixty-four".