402123402 has 48 divisors (see below), whose sum is σ = 894965760. Its totient is φ = 130437216.

The previous prime is 402123373. The next prime is 402123427. The reversal of 402123402 is 204321204.

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

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 119499 + ... + 122817.

It is an arithmetic number, because the mean of its divisors is an integer number (18645120).

Almost surely, 2^402123402 is an apocalyptic number.

402123402 is an abundant number, since it is smaller than the sum of its proper divisors (492842358).

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

402123402 is a wasteful number, since it uses less digits than its factorization.

402123402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507 (or 3504 counting only the distinct ones).

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

The square root of 402123402 is about 20053.0147858121. The cubic root of 402123402 is about 738.1077794425.

Adding to 402123402 its reverse (204321204), we get a palindrome (606444606).

The spelling of 402123402 in words is "four hundred two million, one hundred twenty-three thousand, four hundred two".