121623628 has 12 divisors (see below), whose sum is σ = 243247312. Its totient is φ = 52124400.

The previous prime is 121623613. The next prime is 121623647. The reversal of 121623628 is 826326121.

121623628 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 121623628.

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, 2171823 + ... + 2171878.

Almost surely, 2^121623628 is an apocalyptic number.

It is an amenable number.

121623628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121623628 is a wasteful number, since it uses less digits than its factorization.

121623628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343712 (or 4343710 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 121623628 is about 11028.3102966864. The cubic root of 121623628 is about 495.4570183164.

Adding to 121623628 its reverse (826326121), we get a palindrome (947949749).

The spelling of 121623628 in words is "one hundred twenty-one million, six hundred twenty-three thousand, six hundred twenty-eight".