55078000 has 40 divisors (see below), whose sum is σ = 133183440. Its totient is φ = 22030400.

The previous prime is 55077991. The next prime is 55078003. The reversal of 55078000 is 87055.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55078003) 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 7 ways as a sum of consecutive naturals, for example, 11770 + ... + 15769.

It is an arithmetic number, because the mean of its divisors is an integer number (3329586).

Almost surely, 2^55078000 is an apocalyptic number.

55078000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55078000 is an abundant number, since it is smaller than the sum of its proper divisors (78105440).

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

55078000 is a wasteful number, since it uses less digits than its factorization.

55078000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27562 (or 27546 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 55078000 is about 7421.4553828747. The cubic root of 55078000 is about 380.4749370926.

The spelling of 55078000 in words is "fifty-five million, seventy-eight thousand".