55301440 has 56 divisors (see below), whose sum is σ = 134782560. Its totient is φ = 21600768.

The previous prime is 55301431. The next prime is 55301447. The reversal of 55301440 is 4410355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55301447) 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, 11751 + ... + 15769.

Almost surely, 2^55301440 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 55301440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67391280).

55301440 is an abundant number, since it is smaller than the sum of its proper divisors (79481120).

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

55301440 is a wasteful number, since it uses less digits than its factorization.

55301440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55301440 is about 7436.4937974828. The cubic root of 55301440 is about 380.9887454969.

Adding to 55301440 its reverse (4410355), we get a palindrome (59711795).

The spelling of 55301440 in words is "fifty-five million, three hundred one thousand, four hundred forty".