54778890 has 16 divisors (see below), whose sum is σ = 131469408. Its totient is φ = 14607696.

The previous prime is 54778873. The next prime is 54778901. The reversal of 54778890 is 9887745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912952 + ... + 913011.

It is an arithmetic number, because the mean of its divisors is an integer number (8216838).

Almost surely, 2^54778890 is an apocalyptic number.

54778890 is an abundant number, since it is smaller than the sum of its proper divisors (76690518).

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

54778890 is a wasteful number, since it uses less digits than its factorization.

54778890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825973.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 54778890 is about 7401.2762412978. The cubic root of 54778890 is about 379.7849429489.

The spelling of 54778890 in words is "fifty-four million, seven hundred seventy-eight thousand, eight hundred ninety".