402606078784 has 448 divisors, whose sum is σ = 1045167685632. Its totient is φ = 149630976000.

The previous prime is 402606078779. The next prime is 402606078793. The reversal of 402606078784 is 487870606204.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1004004984 + ... + 1004005384.

It is an arithmetic number, because the mean of its divisors is an integer number (2332963584).

Almost surely, 2^402606078784 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 402606078784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522583842816).

402606078784 is an abundant number, since it is smaller than the sum of its proper divisors (642561606848).

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

402606078784 is a wasteful number, since it uses less digits than its factorization.

402606078784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 402606078784 in words is "four hundred two billion, six hundred six million, seventy-eight thousand, seven hundred eighty-four".