400108780 has 12 divisors (see below), whose sum is σ = 840228480. Its totient is φ = 160043504.

The previous prime is 400108763. The next prime is 400108781. The reversal of 400108780 is 87801004.

It is not an unprimeable number, because it can be changed into a prime (400108781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10002700 + ... + 10002739.

It is an arithmetic number, because the mean of its divisors is an integer number (70019040).

Almost surely, 2^400108780 is an apocalyptic number.

It is an amenable number.

400108780 is an abundant number, since it is smaller than the sum of its proper divisors (440119700).

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

400108780 is a wasteful number, since it uses less digits than its factorization.

400108780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20005448 (or 20005446 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 400108780 is about 20002.7193151331. The cubic root of 400108780 is about 736.8730851654.

Adding to 400108780 its reverse (87801004), we get a palindrome (487909784).

The spelling of 400108780 in words is "four hundred million, one hundred eight thousand, seven hundred eighty".