55484840 has 16 divisors (see below), whose sum is σ = 124840980. Its totient is φ = 22193920.

The previous prime is 55484837. The next prime is 55484843. The reversal of 55484840 is 4848455.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55484837) and next prime (55484843).

It can be written as a sum of positive squares in 2 ways, for example, as 54671236 + 813604 = 7394^2 + 902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55484794 and 55484803.

It is not an unprimeable number, because it can be changed into a prime (55484843) 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, 693521 + ... + 693600.

Almost surely, 2^55484840 is an apocalyptic number.

It is an amenable number.

55484840 is an abundant number, since it is smaller than the sum of its proper divisors (69356140).

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

55484840 is a wasteful number, since it uses less digits than its factorization.

55484840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387132 (or 1387128 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 38.

The square root of 55484840 is about 7448.8146708050. The cubic root of 55484840 is about 381.4094472363.

It can be divided in two parts, 554 and 84840, that multiplied together give a triangular number (47001360 = T₉₆₉₅).

The spelling of 55484840 in words is "fifty-five million, four hundred eighty-four thousand, eight hundred forty".