52257740 has 24 divisors (see below), whose sum is σ = 109961712.
Its totient is φ = 20861120.
The previous prime is 52257731. The next prime is 52257757. The reversal of 52257740 is 4775225.
It is a junction number, because it is equal to n+sod(n) for n = 52257697 and 52257706.
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, 8795 + ... + 13485.
It is an arithmetic number, because the mean of its divisors is an integer number (4581738).
Almost surely, 252257740 is an apocalyptic number.
It is an amenable number.
52257740 is an abundant number, since it is smaller than the sum of its proper divisors (57703972).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
52257740 is a wasteful number, since it uses less digits than its factorization.
52257740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5257 (or 5255 counting only the distinct ones).
The product of its (nonzero) digits is 19600, while the sum is 32.
The square root of 52257740 is about 7228.9515145697.
The cubic root of 52257740 is about 373.8667774525.
The spelling of 52257740 in words is "fifty-two million, two hundred fifty-seven thousand, seven hundred forty".