123861620 has 24 divisors (see below), whose sum is σ = 262639104. Its totient is φ = 49062816.

The previous prime is 123861613. The next prime is 123861623. The reversal of 123861620 is 26168321.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123861623) 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, 28004 + ... + 32123.

It is an arithmetic number, because the mean of its divisors is an integer number (10943296).

Almost surely, 2^123861620 is an apocalyptic number.

123861620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123861620 is an abundant number, since it is smaller than the sum of its proper divisors (138777484).

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

123861620 is a wasteful number, since it uses less digits than its factorization.

123861620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60239 (or 60237 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 123861620 is about 11129.3135457673. The cubic root of 123861620 is about 498.4775288686.

The spelling of 123861620 in words is "one hundred twenty-three million, eight hundred sixty-one thousand, six hundred twenty".