53778140 has 96 divisors (see below), whose sum is σ = 134628480. Its totient is φ = 17875968.

The previous prime is 53778139. The next prime is 53778143. The reversal of 53778140 is 4187735.

It is a super-4 number, since 4×53778140⁴ (a number of 32 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53778140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53778143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2338169 + ... + 2338191.

It is an arithmetic number, because the mean of its divisors is an integer number (1402380).

Almost surely, 2^53778140 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 53778140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67314240).

53778140 is an abundant number, since it is smaller than the sum of its proper divisors (80850340).

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

53778140 is a wasteful number, since it uses less digits than its factorization.

53778140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 53778140 is about 7333.3580302614. The cubic root of 53778140 is about 377.4579635370.

The spelling of 53778140 in words is "fifty-three million, seven hundred seventy-eight thousand, one hundred forty".