402420444431 has 8 divisors (see below), whose sum is σ = 416088250704. Its totient is φ = 388936098880.

The previous prime is 402420444409. The next prime is 402420444451. The reversal of 402420444431 is 134444024204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402420444431 - 2¹⁰ = 402420443407 is a prime.

It is a super-2 number, since 2×402420444431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402420444401) 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, 45860720 + ... + 45869493.

It is an arithmetic number, because the mean of its divisors is an integer number (52011031338).

Almost surely, 2^402420444431 is an apocalyptic number.

402420444431 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402420444431 is a deficient number, since it is larger than the sum of its proper divisors (13667806273).

402420444431 is a wasteful number, since it uses less digits than its factorization.

402420444431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91730361.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 402420444431 its reverse (134444024204), we get a palindrome (536864468635).

The spelling of 402420444431 in words is "four hundred two billion, four hundred twenty million, four hundred forty-four thousand, four hundred thirty-one".