400311852540 has 96 divisors (see below), whose sum is σ = 1125746427456. Its totient is φ = 106286315520.

The previous prime is 400311852539. The next prime is 400311852541. The reversal of 400311852540 is 45258113004.

It is an interprime number because it is at equal distance from previous prime (400311852539) and next prime (400311852541).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400311852541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23140134 + ... + 23157426.

It is an arithmetic number, because the mean of its divisors is an integer number (11726525286).

Almost surely, 2^400311852540 is an apocalyptic number.

It is an amenable number.

400311852540 is an abundant number, since it is smaller than the sum of its proper divisors (725434574916).

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

400311852540 is a wasteful number, since it uses less digits than its factorization.

400311852540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18959 (or 18957 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 400311852540 its reverse (45258113004), we get a palindrome (445569965544).

The spelling of 400311852540 in words is "four hundred billion, three hundred eleven million, eight hundred fifty-two thousand, five hundred forty".