52778020 has 12 divisors (see below), whose sum is σ = 110833884. Its totient is φ = 21111200.

The previous prime is 52778003. The next prime is 52778023. The reversal of 52778020 is 2087725.

It can be written as a sum of positive squares in 2 ways, for example, as 23444964 + 29333056 = 4842^2 + 5416^2 .

It is not an unprimeable number, because it can be changed into a prime (52778023) 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, 1319431 + ... + 1319470.

It is an arithmetic number, because the mean of its divisors is an integer number (9236157).

Almost surely, 2^52778020 is an apocalyptic number.

It is an amenable number.

52778020 is an abundant number, since it is smaller than the sum of its proper divisors (58055864).

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

52778020 is a wasteful number, since it uses less digits than its factorization.

52778020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638910 (or 2638908 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 52778020 is about 7264.8482434253. The cubic root of 52778020 is about 375.1034262869.

The spelling of 52778020 in words is "fifty-two million, seven hundred seventy-eight thousand, twenty".