402142032424 has 128 divisors (see below), whose sum is σ = 889274090880. Its totient is φ = 168456601600.

The previous prime is 402142032421. The next prime is 402142032443. The reversal of 402142032424 is 424230241204.

It is a junction number, because it is equal to n+sod(n) for n = 402142032392 and 402142032401.

It is not an unprimeable number, because it can be changed into a prime (402142032421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14016654 + ... + 14045314.

It is an arithmetic number, because the mean of its divisors is an integer number (6947453835).

Almost surely, 2^402142032424 is an apocalyptic number.

402142032424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402142032424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444637045440).

402142032424 is an abundant number, since it is smaller than the sum of its proper divisors (487132058456).

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

402142032424 is a wasteful number, since it uses less digits than its factorization.

402142032424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28891 (or 28887 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 402142032424 its reverse (424230241204), we get a palindrome (826372273628).

The spelling of 402142032424 in words is "four hundred two billion, one hundred forty-two million, thirty-two thousand, four hundred twenty-four".