52669440 has 220 divisors, whose sum is σ = 190223616. Its totient is φ = 13934592.

The previous prime is 52669429. The next prime is 52669447. The reversal of 52669440 is 4496625.

52669440 is a `hidden beast` number, since 526 + 6 + 94 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 52669395 and 52669404.

It is not an unprimeable number, because it can be changed into a prime (52669447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 414657 + ... + 414783.

Almost surely, 2^52669440 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 52669440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95111808).

52669440 is an abundant number, since it is smaller than the sum of its proper divisors (137554176).

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

52669440 is a wasteful number, since it uses less digits than its factorization.

52669440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 52669440 is about 7257.3714249720. The cubic root of 52669440 is about 374.8460167798.

It can be divided in two parts, 5266 and 9440, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 52669440 in words is "fifty-two million, six hundred sixty-nine thousand, four hundred forty".