52878312 has 128 divisors (see below), whose sum is σ = 155520000. Its totient is φ = 16623360.

The previous prime is 52878307. The next prime is 52878317. The reversal of 52878312 is 21387825.

It is an interprime number because it is at equal distance from previous prime (52878307) and next prime (52878317).

It is a super-2 number, since 2×52878312² = 5592231759938688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52878317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354814 + ... + 354962.

It is an arithmetic number, because the mean of its divisors is an integer number (1215000).

Almost surely, 2^52878312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52878312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77760000).

52878312 is an abundant number, since it is smaller than the sum of its proper divisors (102641688).

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

52878312 is a wasteful number, since it uses less digits than its factorization.

52878312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 238 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 52878312 is about 7271.7475203695. The cubic root of 52878312 is about 375.3408740525.

The spelling of 52878312 in words is "fifty-two million, eight hundred seventy-eight thousand, three hundred twelve".