252478278 has 24 divisors (see below), whose sum is σ = 589116528. Its totient is φ = 77685552.

The previous prime is 252478249. The next prime is 252478279. The reversal of 252478278 is 872874252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252478279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539250 + ... + 539717.

It is an arithmetic number, because the mean of its divisors is an integer number (24546522).

Almost surely, 2^252478278 is an apocalyptic number.

252478278 is an abundant number, since it is smaller than the sum of its proper divisors (336638250).

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

252478278 is a wasteful number, since it uses less digits than its factorization.

252478278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078988 (or 1078985 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 252478278 is about 15889.5650664202. The cubic root of 252478278 is about 632.0353072060.

The spelling of 252478278 in words is "two hundred fifty-two million, four hundred seventy-eight thousand, two hundred seventy-eight".