402144949 has 4 divisors (see below), whose sum is σ = 419629536. Its totient is φ = 384660364.

The previous prime is 402144947. The next prime is 402144983. The reversal of 402144949 is 949441204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402144949 - 2¹ = 402144947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8742259 + ... + 8742304.

It is an arithmetic number, because the mean of its divisors is an integer number (104907384).

Almost surely, 2^402144949 is an apocalyptic number.

It is an amenable number.

402144949 is a deficient number, since it is larger than the sum of its proper divisors (17484587).

402144949 is a wasteful number, since it uses less digits than its factorization.

402144949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17484586.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 402144949 is about 20053.5520295034. The cubic root of 402144949 is about 738.1209625634.

The spelling of 402144949 in words is "four hundred two million, one hundred forty-four thousand, nine hundred forty-nine".