52781286 has 8 divisors (see below), whose sum is σ = 105562584. Its totient is φ = 17593760.

The previous prime is 52781249. The next prime is 52781303. The reversal of 52781286 is 68218725.

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

52781286 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4398435 + ... + 4398446.

It is an arithmetic number, because the mean of its divisors is an integer number (13195323).

Almost surely, 2^52781286 is an apocalyptic number.

52781286 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.

52781286 is a wasteful number, since it uses less digits than its factorization.

52781286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796886.

The product of its digits is 53760, while the sum is 39.

The square root of 52781286 is about 7265.0730209682. The cubic root of 52781286 is about 375.1111634883. Note that the first 4 decimals are identical.

The spelling of 52781286 in words is "fifty-two million, seven hundred eighty-one thousand, two hundred eighty-six".