55978076 has 48 divisors (see below), whose sum is σ = 129330432. Its totient is φ = 20524800.

The previous prime is 55978061. The next prime is 55978163. The reversal of 55978076 is 67087955.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55978076.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110 + ... + 10581.

It is an arithmetic number, because the mean of its divisors is an integer number (2694384).

Almost surely, 2^55978076 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 55978076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64665216).

55978076 is an abundant number, since it is smaller than the sum of its proper divisors (73352356).

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

55978076 is a wasteful number, since it uses less digits than its factorization.

55978076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10730 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 55978076 is about 7481.8497712798. The cubic root of 55978076 is about 382.5363025337.

The spelling of 55978076 in words is "fifty-five million, nine hundred seventy-eight thousand, seventy-six".