52645866 has 48 divisors (see below), whose sum is σ = 130319424. Its totient is φ = 13882752.

The previous prime is 52645849. The next prime is 52645883. The reversal of 52645866 is 66854625.

52645866 = 184² + 185² + ... + 547².

It is an interprime number because it is at equal distance from previous prime (52645849) and next prime (52645883).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3390 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (2714988).

Almost surely, 2^52645866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52645866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65159712).

52645866 is an abundant number, since it is smaller than the sum of its proper divisors (77673558).

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

52645866 is a wasteful number, since it uses less digits than its factorization.

52645866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455 (or 7442 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 52645866 is about 7255.7471014362. The cubic root of 52645866 is about 374.7900834042.

The spelling of 52645866 in words is "fifty-two million, six hundred forty-five thousand, eight hundred sixty-six".