52978290 has 64 divisors (see below), whose sum is σ = 136567296. Its totient is φ = 13105152.

The previous prime is 52978271. The next prime is 52978297. The reversal of 52978290 is 9287925.

It is a super-2 number, since 2×52978290² = 5613398422648200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52978297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36519 + ... + 37941.

It is an arithmetic number, because the mean of its divisors is an integer number (2133864).

Almost surely, 2^52978290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52978290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68283648).

52978290 is an abundant number, since it is smaller than the sum of its proper divisors (83589006).

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

52978290 is a wasteful number, since it uses less digits than its factorization.

52978290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 52978290 is about 7278.6186876357. The cubic root of 52978290 is about 375.5772797611.

The spelling of 52978290 in words is "fifty-two million, nine hundred seventy-eight thousand, two hundred ninety".