402040430 has 16 divisors (see below), whose sum is σ = 789461424. Its totient is φ = 146196480.

The previous prime is 402040421. The next prime is 402040439. The reversal of 402040430 is 34040204.

It is an interprime number because it is at equal distance from previous prime (402040421) and next prime (402040439).

It is a junction number, because it is equal to n+sod(n) for n = 402040399 and 402040408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402040439) 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, 1827347 + ... + 1827566.

It is an arithmetic number, because the mean of its divisors is an integer number (49341339).

Almost surely, 2^402040430 is an apocalyptic number.

402040430 is a deficient number, since it is larger than the sum of its proper divisors (387420994).

402040430 is a wasteful number, since it uses less digits than its factorization.

402040430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654931.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 402040430 is about 20050.9458629761. The cubic root of 402040430 is about 738.0570102085.

Adding to 402040430 its reverse (34040204), we get a palindrome (436080634).

The spelling of 402040430 in words is "four hundred two million, forty thousand, four hundred thirty".