402312042 has 128 divisors (see below), whose sum is σ = 1051776000. Its totient is φ = 112674240.

The previous prime is 402312037. The next prime is 402312047. The reversal of 402312042 is 240213204.

It is an interprime number because it is at equal distance from previous prime (402312037) and next prime (402312047).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402312047) 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 63 ways as a sum of consecutive naturals, for example, 484884 + ... + 485712.

It is an arithmetic number, because the mean of its divisors is an integer number (8217000).

Almost surely, 2^402312042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402312042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525888000).

402312042 is an abundant number, since it is smaller than the sum of its proper divisors (649463958).

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

402312042 is a wasteful number, since it uses less digits than its factorization.

402312042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402312042 is about 20057.7177664858. The cubic root of 402312042 is about 738.2231792460.

Adding to 402312042 its reverse (240213204), we get a palindrome (642525246).

The spelling of 402312042 in words is "four hundred two million, three hundred twelve thousand, forty-two".