43802981 has 8 divisors (see below), whose sum is σ = 44341440. Its totient is φ = 43267392.

The previous prime is 43802977. The next prime is 43803029. The reversal of 43802981 is 18920834.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43802981 - 2² = 43802977 is a prime.

It is a super-2 number, since 2×43802981² = 3837402288972722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43802881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49166 + ... + 50048.

It is an arithmetic number, because the mean of its divisors is an integer number (5542680).

Almost surely, 2^43802981 is an apocalyptic number.

It is an amenable number.

43802981 is a deficient number, since it is larger than the sum of its proper divisors (538459).

43802981 is a wasteful number, since it uses less digits than its factorization.

43802981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 43802981 is about 6618.3820530399. The cubic root of 43802981 is about 352.5071165339.

The spelling of 43802981 in words is "forty-three million, eight hundred two thousand, nine hundred eighty-one".