861632 has 14 divisors (see below), whose sum is σ = 1709928. Its totient is φ = 430784.

The previous prime is 861617. The next prime is 861647. The reversal of 861632 is 236168.

It is an interprime number because it is at equal distance from previous prime (861617) and next prime (861647).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6668 + ... + 6795.

2⁸⁶¹⁶³² is an apocalyptic number.

It is an amenable number.

861632 is a deficient number, since it is larger than the sum of its proper divisors (848296).

861632 is a wasteful number, since it uses less digits than its factorization.

861632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475 (or 13465 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 861632 is about 928.2413479263. The cubic root of 861632 is about 95.1569704087.

The spelling of 861632 in words is "eight hundred sixty-one thousand, six hundred thirty-two".