402520422 has 16 divisors (see below), whose sum is σ = 805780080. Its totient is φ = 134050272.

The previous prime is 402520421. The next prime is 402520423. The reversal of 402520422 is 224025204.

It is an interprime number because it is at equal distance from previous prime (402520421) and next prime (402520423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402520421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23593 + ... + 36900.

It is an arithmetic number, because the mean of its divisors is an integer number (50361255).

Almost surely, 2^402520422 is an apocalyptic number.

402520422 is an abundant number, since it is smaller than the sum of its proper divisors (403259658).

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

402520422 is a wasteful number, since it uses less digits than its factorization.

402520422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61607.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 402520422 is about 20062.9116032544. The cubic root of 402520422 is about 738.3506129943.

Adding to 402520422 its reverse (224025204), we get a palindrome (626545626).

The spelling of 402520422 in words is "four hundred two million, five hundred twenty thousand, four hundred twenty-two".