402423340 has 24 divisors (see below), whose sum is σ = 921915792. Its totient is φ = 146335680.

The previous prime is 402423331. The next prime is 402423349. The reversal of 402423340 is 43324204.

It is an interprime number because it is at equal distance from previous prime (402423331) and next prime (402423349).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (402423349) 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 7 ways as a sum of consecutive naturals, for example, 914379 + ... + 914818.

It is an arithmetic number, because the mean of its divisors is an integer number (38413158).

Almost surely, 2^402423340 is an apocalyptic number.

It is an amenable number.

402423340 is an abundant number, since it is smaller than the sum of its proper divisors (519492452).

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

402423340 is a wasteful number, since it uses less digits than its factorization.

402423340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829217 (or 1829215 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 402423340 is about 20060.4920178943. The cubic root of 402423340 is about 738.2912484554.

Adding to 402423340 its reverse (43324204), we get a palindrome (445747544).

The spelling of 402423340 in words is "four hundred two million, four hundred twenty-three thousand, three hundred forty".