5401320440 has 32 divisors (see below), whose sum is σ = 12156860160. Its totient is φ = 2159836800.

The previous prime is 5401320289. The next prime is 5401320451. The reversal of 5401320440 is 440231045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115730 + ... + 155550.

It is an arithmetic number, because the mean of its divisors is an integer number (379901880).

Almost surely, 2^5401320440 is an apocalyptic number.

It is an amenable number.

5401320440 is an abundant number, since it is smaller than the sum of its proper divisors (6755539720).

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

5401320440 is a wasteful number, since it uses less digits than its factorization.

5401320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43223 (or 43219 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 5401320440 is about 73493.6761905404. The cubic root of 5401320440 is about 1754.5536309026.

Adding to 5401320440 its reverse (440231045), we get a palindrome (5841551485).

The spelling of 5401320440 in words is "five billion, four hundred one million, three hundred twenty thousand, four hundred forty".