651632 has 20 divisors (see below), whose sum is σ = 1275960. Its totient is φ = 322368.

The previous prime is 651617. The next prime is 651641. The reversal of 651632 is 236156.

651632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 651598 and 651607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078 + ... + 2370.

It is an arithmetic number, because the mean of its divisors is an integer number (63798).

2⁶⁵¹⁶³² is an apocalyptic number.

It is an amenable number.

651632 is a deficient number, since it is larger than the sum of its proper divisors (624328).

651632 is a wasteful number, since it uses less digits than its factorization.

651632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 434 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 651632 is about 807.2372637583. The cubic root of 651632 is about 86.6963474934.

Adding to 651632 its reverse (236156), we get a palindrome (887788).

The spelling of 651632 in words is "six hundred fifty-one thousand, six hundred thirty-two".