55078740 has 72 divisors (see below), whose sum is σ = 168222600. Its totient is φ = 14586624.

The previous prime is 55078733. The next prime is 55078741. The reversal of 55078740 is 4787055.

55078740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7551504 + 47527236 = 2748^2 + 6894^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55078695 and 55078704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55078741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27286 + ... + 29234.

It is an arithmetic number, because the mean of its divisors is an integer number (2336425).

Almost surely, 2^55078740 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 55078740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84111300).

55078740 is an abundant number, since it is smaller than the sum of its proper divisors (113143860).

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

55078740 is a wasteful number, since it uses less digits than its factorization.

55078740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 55078740 is about 7421.5052381576. The cubic root of 55078740 is about 380.4766410409.

The spelling of 55078740 in words is "fifty-five million, seventy-eight thousand, seven hundred forty".