380406642826 has 48 divisors (see below), whose sum is σ = 713572329600. Its totient is φ = 151164595008.

The previous prime is 380406642823. The next prime is 380406642827. The reversal of 380406642826 is 628246604083.

It is a super-2 number, since 2×380406642826² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 380406642826.

It is not an unprimeable number, because it can be changed into a prime (380406642823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2085891 + ... + 2260918.

It is an arithmetic number, because the mean of its divisors is an integer number (14866090200).

Almost surely, 2^380406642826 is an apocalyptic number.

380406642826 is a deficient number, since it is larger than the sum of its proper divisors (333165686774).

380406642826 is a wasteful number, since it uses less digits than its factorization.

380406642826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346891 (or 4346884 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 49.

It can be divided in two parts, 38040 and 6642826, that added together give a palindrome (6680866).

The spelling of 380406642826 in words is "three hundred eighty billion, four hundred six million, six hundred forty-two thousand, eight hundred twenty-six".