555401440 has 48 divisors (see below), whose sum is σ = 1431425520. Its totient is φ = 201963520.

The previous prime is 555401437. The next prime is 555401443. The reversal of 555401440 is 44104555.

It is an interprime number because it is at equal distance from previous prime (555401437) and next prime (555401443).

It is a junction number, because it is equal to n+sod(n) for n = 555401399 and 555401408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555401443) 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, 156025 + ... + 159544.

It is an arithmetic number, because the mean of its divisors is an integer number (29821365).

Almost surely, 2^555401440 is an apocalyptic number.

It is an amenable number.

555401440 is an abundant number, since it is smaller than the sum of its proper divisors (876024080).

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

555401440 is a wasteful number, since it uses less digits than its factorization.

555401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315595 (or 315587 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 555401440 is about 23566.9565281561. The cubic root of 555401440 is about 821.9946680844.

Adding to 555401440 its reverse (44104555), we get a palindrome (599505995).

The spelling of 555401440 in words is "five hundred fifty-five million, four hundred one thousand, four hundred forty".