52209778 has 8 divisors (see below), whose sum is σ = 79598700. Its totient is φ = 25676880.

The previous prime is 52209763. The next prime is 52209811. The reversal of 52209778 is 87790225.

It can be written as a sum of positive squares in 2 ways, for example, as 34257609 + 17952169 = 5853^2 + 4237^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 52209778.

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, 213853 + ... + 214096.

Almost surely, 2^52209778 is an apocalyptic number.

52209778 is a deficient number, since it is larger than the sum of its proper divisors (27388922).

52209778 is a wasteful number, since it uses less digits than its factorization.

52209778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428012.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 52209778 is about 7225.6333978413. The cubic root of 52209778 is about 373.7523645000.

The spelling of 52209778 in words is "fifty-two million, two hundred nine thousand, seven hundred seventy-eight".