43402044 has 72 divisors (see below), whose sum is σ = 118691328. Its totient is φ = 12307680.

The previous prime is 43402031. The next prime is 43402091. The reversal of 43402044 is 44020434.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 43402044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130959 + ... + 131289.

Almost surely, 2^43402044 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 43402044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59345664).

43402044 is an abundant number, since it is smaller than the sum of its proper divisors (75289284).

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

43402044 is a wasteful number, since it uses less digits than its factorization.

43402044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 43402044 is about 6588.0227686310. The cubic root of 43402044 is about 351.4282967430.

Adding to 43402044 its reverse (44020434), we get a palindrome (87422478).

The spelling of 43402044 in words is "forty-three million, four hundred two thousand, forty-four".