402344109 has 6 divisors (see below), whose sum is σ = 581163726. Its totient is φ = 268229400.

The previous prime is 402344081. The next prime is 402344113. The reversal of 402344109 is 901443204.

It can be written as a sum of positive squares in only one way, i.e., 395134884 + 7209225 = 19878^2 + 2685^2 .

It is not a de Polignac number, because 402344109 - 2¹⁶ = 402278573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402344119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22352442 + ... + 22352459.

It is an arithmetic number, because the mean of its divisors is an integer number (96860621).

Almost surely, 2^402344109 is an apocalyptic number.

It is an amenable number.

402344109 is a deficient number, since it is larger than the sum of its proper divisors (178819617).

402344109 is a wasteful number, since it uses less digits than its factorization.

402344109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44704907 (or 44704904 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 402344109 is about 20058.5171186706. The cubic root of 402344109 is about 738.2427925240.

The spelling of 402344109 in words is "four hundred two million, three hundred forty-four thousand, one hundred nine".