53778620 has 24 divisors (see below), whose sum is σ = 129069024. Its totient is φ = 18438336.

The previous prime is 53778611. The next prime is 53778629. The reversal of 53778620 is 2687735.

It is a happy number.

53778620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53778611) and next prime (53778629).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53778629) 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 7 ways as a sum of consecutive naturals, for example, 191927 + ... + 192206.

It is an arithmetic number, because the mean of its divisors is an integer number (5377876).

Almost surely, 2^53778620 is an apocalyptic number.

It is an amenable number.

53778620 is an abundant number, since it is smaller than the sum of its proper divisors (75290404).

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

53778620 is a wasteful number, since it uses less digits than its factorization.

53778620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384149 (or 384147 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 53778620 is about 7333.3907573509. The cubic root of 53778620 is about 377.4590865415.

The spelling of 53778620 in words is "fifty-three million, seven hundred seventy-eight thousand, six hundred twenty".