404011020402 has 256 divisors, whose sum is σ = 1020534681600. Its totient is φ = 117427968000.

The previous prime is 404011020383. The next prime is 404011020419. The reversal of 404011020402 is 204020110404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 249542749 + ... + 249544367.

It is an arithmetic number, because the mean of its divisors is an integer number (3986463600).

Almost surely, 2^404011020402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404011020402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510267340800).

404011020402 is an abundant number, since it is smaller than the sum of its proper divisors (616523661198).

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

404011020402 is a wasteful number, since it uses less digits than its factorization.

404011020402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 404011020402 its reverse (204020110404), we get a palindrome (608031130806).

The spelling of 404011020402 in words is "four hundred four billion, eleven million, twenty thousand, four hundred two".