53778558 has 8 divisors (see below), whose sum is σ = 107557128. Its totient is φ = 17926184.

The previous prime is 53778553. The next prime is 53778587. The reversal of 53778558 is 85587735.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

53778558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53778551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4481541 + ... + 4481552.

It is an arithmetic number, because the mean of its divisors is an integer number (13444641).

Almost surely, 2^53778558 is an apocalyptic number.

53778558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

53778558 is a wasteful number, since it uses less digits than its factorization.

53778558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963098.

The product of its digits is 1176000, while the sum is 48.

The square root of 53778558 is about 7333.3865301101. The cubic root of 53778558 is about 377.4589414871.

The spelling of 53778558 in words is "fifty-three million, seven hundred seventy-eight thousand, five hundred fifty-eight".