43402144 has 24 divisors (see below), whose sum is σ = 85613220. Its totient is φ = 21659136.

The previous prime is 43402133. The next prime is 43402157. The reversal of 43402144 is 44120434.

It can be written as a sum of positive squares in 2 ways, for example, as 43401744 + 400 = 6588^2 + 20^2 .

It is a super-2 number, since 2×43402144² = 3767492207593472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21732 + ... + 23644.

Almost surely, 2^43402144 is an apocalyptic number.

It is an amenable number.

43402144 is a deficient number, since it is larger than the sum of its proper divisors (42211076).

43402144 is a wasteful number, since it uses less digits than its factorization.

43402144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 43402144 is about 6588.0303581571. The cubic root of 43402144 is about 351.4285666443.

Adding to 43402144 its reverse (44120434), we get a palindrome (87522578).

The spelling of 43402144 in words is "forty-three million, four hundred two thousand, one hundred forty-four".