43902 has 20 divisors (see below), whose sum is σ = 98736. Its totient is φ = 14580.

The previous prime is 43891. The next prime is 43913. The reversal of 43902 is 20934.

It is an interprime number because it is at equal distance from previous prime (43891) and next prime (43913).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

43902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27 + ... + 297.

2⁴³⁹⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49368).

43902 is an abundant number, since it is smaller than the sum of its proper divisors (54834).

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

43902 is a wasteful number, since it uses less digits than its factorization.

43902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 43902 is about 209.5280410828. The cubic root of 43902 is about 35.2772537082.

The spelling of 43902 in words is "forty-three thousand, nine hundred two".