400301320 has 16 divisors (see below), whose sum is σ = 900678060. Its totient is φ = 160120512.

The previous prime is 400301311. The next prime is 400301323. The reversal of 400301320 is 23103004.

It can be written as a sum of positive squares in 2 ways, for example, as 387066276 + 13235044 = 19674^2 + 3638^2 .

It is a super-2 number, since 2×400301320² = 320482293587484800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400301320.

It is not an unprimeable number, because it can be changed into a prime (400301323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003727 + ... + 5003806.

Almost surely, 2^400301320 is an apocalyptic number.

400301320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400301320 is an abundant number, since it is smaller than the sum of its proper divisors (500376740).

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

400301320 is a wasteful number, since it uses less digits than its factorization.

400301320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007544 (or 10007540 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400301320 is about 20007.5315818819. The cubic root of 400301320 is about 736.9912653528.

Adding to 400301320 its reverse (23103004), we get a palindrome (423404324).

The spelling of 400301320 in words is "four hundred million, three hundred one thousand, three hundred twenty".