55480740 has 144 divisors (see below), whose sum is σ = 183399552. Its totient is φ = 12493824.

The previous prime is 55480729. The next prime is 55480759. The reversal of 55480740 is 4708455.

It is a super-2 number, since 2×55480740² = 6156225021895200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332137 + ... + 332303.

It is an arithmetic number, because the mean of its divisors is an integer number (1273608).

Almost surely, 2^55480740 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 55480740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91699776).

55480740 is an abundant number, since it is smaller than the sum of its proper divisors (127918812).

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

55480740 is a wasteful number, since it uses less digits than its factorization.

55480740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 55480740 is about 7448.5394541480. The cubic root of 55480740 is about 381.4000523742.

The spelling of 55480740 in words is "fifty-five million, four hundred eighty thousand, seven hundred forty".