651887860 has 48 divisors (see below), whose sum is σ = 1477187712. Its totient is φ = 240220800.

The previous prime is 651887837. The next prime is 651887879. The reversal of 651887860 is 68788156.

651887860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146265 + ... + 150655.

It is an arithmetic number, because the mean of its divisors is an integer number (30774744).

Almost surely, 2^651887860 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 651887860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738593856).

651887860 is an abundant number, since it is smaller than the sum of its proper divisors (825299852).

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

651887860 is a wasteful number, since it uses less digits than its factorization.

651887860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984 (or 4982 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 651887860 is about 25532.0947045087. The cubic root of 651887860 is about 867.0769296905.

The spelling of 651887860 in words is "six hundred fifty-one million, eight hundred eighty-seven thousand, eight hundred sixty".