402981443 has 4 divisors (see below), whose sum is σ = 403654800. Its totient is φ = 402308088.

The previous prime is 402981421. The next prime is 402981451. The reversal of 402981443 is 344189204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402981443 - 2¹⁰ = 402980419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402981463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335780 + ... + 336977.

It is an arithmetic number, because the mean of its divisors is an integer number (100913700).

Almost surely, 2^402981443 is an apocalyptic number.

402981443 is a deficient number, since it is larger than the sum of its proper divisors (673357).

402981443 is an equidigital number, since it uses as much as digits as its factorization.

402981443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673356.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 402981443 is about 20074.3976995575. The cubic root of 402981443 is about 738.6323918776.

The spelling of 402981443 in words is "four hundred two million, nine hundred eighty-one thousand, four hundred forty-three".