400301230640 has 40 divisors (see below), whose sum is σ = 931303824288. Its totient is φ = 160016670720.

The previous prime is 400301230601. The next prime is 400301230643. The reversal of 400301230640 is 46032103004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (400301230643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1498001 + ... + 1744880.

Almost surely, 2^400301230640 is an apocalyptic number.

400301230640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400301230640 is an abundant number, since it is smaller than the sum of its proper divisors (531002593648).

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

400301230640 is a wasteful number, since it uses less digits than its factorization.

400301230640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244437 (or 3244431 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 400301230640 its reverse (46032103004), we get a palindrome (446333333644).

The spelling of 400301230640 in words is "four hundred billion, three hundred one million, two hundred thirty thousand, six hundred forty".