55087760 has 240 divisors, whose sum is σ = 170989056. Its totient is φ = 16321536.

The previous prime is 55087759. The next prime is 55087763. The reversal of 55087760 is 6778055.

It is a super-2 number, since 2×55087760² = 6069322603635200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55087763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1172057 + ... + 1172103.

Almost surely, 2^55087760 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 55087760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

55087760 is an abundant number, since it is smaller than the sum of its proper divisors (115901296).

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

55087760 is a wasteful number, since it uses less digits than its factorization.

55087760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 55087760 is about 7422.1129067133. The cubic root of 55087760 is about 380.4974095623.

The spelling of 55087760 in words is "fifty-five million, eighty-seven thousand, seven hundred sixty".