402431011444 has 48 divisors (see below), whose sum is σ = 889145671680. Its totient is φ = 154806593760.

The previous prime is 402431011421. The next prime is 402431011447. The reversal of 402431011444 is 444110134204.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402431011447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8245252 + ... + 8293915.

It is an arithmetic number, because the mean of its divisors is an integer number (18523868160).

Almost surely, 2^402431011444 is an apocalyptic number.

402431011444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402431011444 is an abundant number, since it is smaller than the sum of its proper divisors (486714660236).

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

402431011444 is a wasteful number, since it uses less digits than its factorization.

402431011444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16539268 (or 16539266 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 402431011444 its reverse (444110134204), we get a palindrome (846541145648).

The spelling of 402431011444 in words is "four hundred two billion, four hundred thirty-one million, eleven thousand, four hundred forty-four".