402040044660 has 96 divisors (see below), whose sum is σ = 1147642473600. Its totient is φ = 105124511232.

The previous prime is 402040044619. The next prime is 402040044667. The reversal of 402040044660 is 66440040204.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402040044667) 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, 5365614 + ... + 5440026.

It is an arithmetic number, because the mean of its divisors is an integer number (11954609100).

Almost surely, 2^402040044660 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 402040044660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573821236800).

402040044660 is an abundant number, since it is smaller than the sum of its proper divisors (745602428940).

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

402040044660 is a wasteful number, since it uses less digits than its factorization.

402040044660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76177 (or 76175 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 402040044660 its reverse (66440040204), we get a palindrome (468480084864).

The spelling of 402040044660 in words is "four hundred two billion, forty million, forty-four thousand, six hundred sixty".