861620630 has 16 divisors (see below), whose sum is σ = 1670218704. Its totient is φ = 318136800.

The previous prime is 861620621. The next prime is 861620633. The reversal of 861620630 is 36026168.

It is a super-2 number, since 2×861620630² = 1484780220083193800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861620633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3313796 + ... + 3314055.

It is an arithmetic number, because the mean of its divisors is an integer number (104388669).

Almost surely, 2^861620630 is an apocalyptic number.

861620630 is a deficient number, since it is larger than the sum of its proper divisors (808598074).

861620630 is a wasteful number, since it uses less digits than its factorization.

861620630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627871.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 861620630 is about 29353.3751040660. The cubic root of 861620630 is about 951.5655184658.

Adding to 861620630 its reverse (36026168), we get a palindrome (897646798).

The spelling of 861620630 in words is "eight hundred sixty-one million, six hundred twenty thousand, six hundred thirty".