43902442 has 4 divisors (see below), whose sum is σ = 65853666. Its totient is φ = 21951220.

The previous prime is 43902437. The next prime is 43902457. The reversal of 43902442 is 24420934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24420934 = 2 ⋅12210467.

It can be written as a sum of positive squares in only one way, i.e., 33281361 + 10621081 = 5769^2 + 3259^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43902442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10975609 + ... + 10975612.

Almost surely, 2^43902442 is an apocalyptic number.

43902442 is a deficient number, since it is larger than the sum of its proper divisors (21951224).

43902442 is a wasteful number, since it uses less digits than its factorization.

43902442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21951223.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 43902442 is about 6625.8917890349. The cubic root of 43902442 is about 352.7737209684.

It can be divided in two parts, 43902 and 442, that added together give a palindrome (44344).

The spelling of 43902442 in words is "forty-three million, nine hundred two thousand, four hundred forty-two".