55087758 has 48 divisors (see below), whose sum is σ = 132370992. Its totient is φ = 16416000.

The previous prime is 55087757. The next prime is 55087759. The reversal of 55087758 is 85778055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55087757) and next prime (55087759).

It is a super-2 number, since 2×55087758² = 6069322162933128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55087757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9798 + ... + 14358.

It is an arithmetic number, because the mean of its divisors is an integer number (2757729).

Almost surely, 2^55087758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55087758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66185496).

55087758 is an abundant number, since it is smaller than the sum of its proper divisors (77283234).

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

55087758 is a wasteful number, since it uses less digits than its factorization.

55087758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The square root of 55087758 is about 7422.1127719808. The cubic root of 55087758 is about 380.4974049575.

The spelling of 55087758 in words is "fifty-five million, eighty-seven thousand, seven hundred fifty-eight".