402142442340 has 96 divisors (see below), whose sum is σ = 1152725970816. Its totient is φ = 104721638400.

The previous prime is 402142442333. The next prime is 402142442363. The reversal of 402142442340 is 43244241204.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 402142442298 and 402142442307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12142 + ... + 896901.

It is an arithmetic number, because the mean of its divisors is an integer number (12007562196).

Almost surely, 2^402142442340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402142442340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576362985408).

402142442340 is an abundant number, since it is smaller than the sum of its proper divisors (750583528476).

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

402142442340 is a wasteful number, since it uses less digits than its factorization.

402142442340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909229 (or 909227 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 402142442340 its reverse (43244241204), we get a palindrome (445386683544).

The spelling of 402142442340 in words is "four hundred two billion, one hundred forty-two million, four hundred forty-two thousand, three hundred forty".