402040422 has 40 divisors (see below), whose sum is σ = 1029566736. Its totient is φ = 114868368.

The previous prime is 402040421. The next prime is 402040439. The reversal of 402040422 is 224040204.

402040422 is a `hidden beast` number, since 40 + 204 + 0 + 422 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 402040395 and 402040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402040421) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 176133 + ... + 178400.

Almost surely, 2^402040422 is an apocalyptic number.

402040422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

402040422 is an abundant number, since it is smaller than the sum of its proper divisors (627526314).

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

402040422 is a wasteful number, since it uses less digits than its factorization.

402040422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354554 (or 354545 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 402040422 is about 20050.9456634843. The cubic root of 402040422 is about 738.0570053131.

Adding to 402040422 its reverse (224040204), we get a palindrome (626080626).

The spelling of 402040422 in words is "four hundred two million, forty thousand, four hundred twenty-two".