52391178 has 128 divisors (see below), whose sum is σ = 145981440. Its totient is φ = 13582080.

The previous prime is 52391137. The next prime is 52391179. The reversal of 52391178 is 87119325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52391179) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 199075 + ... + 199337.

It is an arithmetic number, because the mean of its divisors is an integer number (1140480).

Almost surely, 2^52391178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52391178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72990720).

52391178 is an abundant number, since it is smaller than the sum of its proper divisors (93590262).

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

52391178 is a wasteful number, since it uses less digits than its factorization.

52391178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 52391178 is about 7238.1750462392. The cubic root of 52391178 is about 374.1847248215.

The spelling of 52391178 in words is "fifty-two million, three hundred ninety-one thousand, one hundred seventy-eight".