652685440 has 128 divisors (see below), whose sum is σ = 1724224320. Its totient is φ = 234270720.

The previous prime is 652685431. The next prime is 652685443. The reversal of 652685440 is 44586256.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 652685393 and 652685402.

It is not an unprimeable number, because it can be changed into a prime (652685443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583762 + ... + 584878.

Almost surely, 2^652685440 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 652685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862112160).

652685440 is an abundant number, since it is smaller than the sum of its proper divisors (1071538880).

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

652685440 is a wasteful number, since it uses less digits than its factorization.

652685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 652685440 is about 25547.7090949463. The cubic root of 652685440 is about 867.4304063188.

The spelling of 652685440 in words is "six hundred fifty-two million, six hundred eighty-five thousand, four hundred forty".