120643630 has 16 divisors (see below), whose sum is σ = 224164224. Its totient is φ = 46700640.

The previous prime is 120643619. The next prime is 120643631. The reversal of 120643630 is 36346021.

It is a junction number, because it is equal to n+sod(n) for n = 120643595 and 120643604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120643631) 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, 194277 + ... + 194896.

It is an arithmetic number, because the mean of its divisors is an integer number (14010264).

Almost surely, 2^120643630 is an apocalyptic number.

120643630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120643630 is a deficient number, since it is larger than the sum of its proper divisors (103520594).

120643630 is a wasteful number, since it uses less digits than its factorization.

120643630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389211.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 120643630 is about 10983.7894189574. The cubic root of 120643630 is about 494.1226918558.

Adding to 120643630 its reverse (36346021), we get a palindrome (156989651).

The spelling of 120643630 in words is "one hundred twenty million, six hundred forty-three thousand, six hundred thirty".