55878732 has 144 divisors (see below), whose sum is σ = 178930752. Its totient is φ = 14307840.

The previous prime is 55878731. The next prime is 55878733. The reversal of 55878732 is 23787855.

It is an interprime number because it is at equal distance from previous prime (55878731) and next prime (55878733).

It is not an unprimeable number, because it can be changed into a prime (55878731) 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 47 ways as a sum of consecutive naturals, for example, 120982 + ... + 121442.

Almost surely, 2^55878732 is an apocalyptic number.

55878732 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55878732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89465376).

55878732 is an abundant number, since it is smaller than the sum of its proper divisors (123052020).

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

55878732 is a wasteful number, since it uses less digits than its factorization.

55878732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 523 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 55878732 is about 7475.2078231980. The cubic root of 55878732 is about 382.3098734719.

The spelling of 55878732 in words is "fifty-five million, eight hundred seventy-eight thousand, seven hundred thirty-two".