402324642 has 24 divisors (see below), whose sum is σ = 872921244. Its totient is φ = 133920864.

The previous prime is 402324619. The next prime is 402324647. The reversal of 402324642 is 246423204.

402324642 = 344² + 345² + ... + 1076².

It can be written as a sum of positive squares in 2 ways, for example, as 401240961 + 1083681 = 20031^2 + 1041^2 .

It is not an unprimeable number, because it can be changed into a prime (402324647) 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 11 ways as a sum of consecutive naturals, for example, 2053 + ... + 28440.

Almost surely, 2^402324642 is an apocalyptic number.

402324642 is an abundant number, since it is smaller than the sum of its proper divisors (470596602).

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

402324642 is a wasteful number, since it uses less digits than its factorization.

402324642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31234 (or 31231 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 402324642 is about 20058.0318575876. The cubic root of 402324642 is about 738.2308859629.

Adding to 402324642 its reverse (246423204), we get a palindrome (648747846).

The spelling of 402324642 in words is "four hundred two million, three hundred twenty-four thousand, six hundred forty-two".