52278390 has 24 divisors (see below), whose sum is σ = 135924048. Its totient is φ = 13940880.

The previous prime is 52278377. The next prime is 52278397. The reversal of 52278390 is 9387225.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52278397) 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, 290346 + ... + 290525.

It is an arithmetic number, because the mean of its divisors is an integer number (5663502).

Almost surely, 2^52278390 is an apocalyptic number.

52278390 is an abundant number, since it is smaller than the sum of its proper divisors (83645658).

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

52278390 is a wasteful number, since it uses less digits than its factorization.

52278390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580884 (or 580881 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 52278390 is about 7230.3796580816. The cubic root of 52278390 is about 373.9160162974.

The spelling of 52278390 in words is "fifty-two million, two hundred seventy-eight thousand, three hundred ninety".