55087878 has 48 divisors (see below), whose sum is σ = 120426480. Its totient is φ = 16777152.

The previous prime is 55087873. The next prime is 55087883. The reversal of 55087878 is 87878055.

It is an interprime number because it is at equal distance from previous prime (55087873) and next prime (55087883).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55087873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62376 + ... + 63252.

It is an arithmetic number, because the mean of its divisors is an integer number (2508885).

Almost surely, 2^55087878 is an apocalyptic number.

55087878 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55087878 is an abundant number, since it is smaller than the sum of its proper divisors (65338602).

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

55087878 is a wasteful number, since it uses less digits than its factorization.

55087878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 48.

The square root of 55087878 is about 7422.1208559279. The cubic root of 55087878 is about 380.4976812419.

The spelling of 55087878 in words is "fifty-five million, eighty-seven thousand, eight hundred seventy-eight".