400278044316 has 48 divisors (see below), whose sum is σ = 935281073664. Its totient is φ = 133240556736.

The previous prime is 400278044311. The next prime is 400278044317. The reversal of 400278044316 is 613440872004.

It is a super-3 number, since 3×400278044316³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400278044311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45445585 + ... + 45454391.

It is an arithmetic number, because the mean of its divisors is an integer number (19485022368).

Almost surely, 2^400278044316 is an apocalyptic number.

It is an amenable number.

400278044316 is an abundant number, since it is smaller than the sum of its proper divisors (535003029348).

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

400278044316 is a wasteful number, since it uses less digits than its factorization.

400278044316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13650 (or 13648 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 400278044316 in words is "four hundred billion, two hundred seventy-eight million, forty-four thousand, three hundred sixteen".