55398080 has 56 divisors (see below), whose sum is σ = 132661152. Its totient is φ = 22034432.

The previous prime is 55398067. The next prime is 55398089. The reversal of 55398080 is 8089355.

It is not an unprimeable number, because it can be changed into a prime (55398089) 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, 74189 + ... + 74931.

Almost surely, 2^55398080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55398080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66330576).

55398080 is an abundant number, since it is smaller than the sum of its proper divisors (77263072).

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

55398080 is a wasteful number, since it uses less digits than its factorization.

55398080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 55398080 is about 7442.9886470423. The cubic root of 55398080 is about 381.2105439773.

The spelling of 55398080 in words is "fifty-five million, three hundred ninety-eight thousand, eighty".