121623928 has 8 divisors (see below), whose sum is σ = 228044880. Its totient is φ = 60811960.

The previous prime is 121623919. The next prime is 121623949. The reversal of 121623928 is 829326121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 121623893 and 121623902.

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, 7601488 + ... + 7601503.

It is an arithmetic number, because the mean of its divisors is an integer number (28505610).

Almost surely, 2^121623928 is an apocalyptic number.

It is an amenable number.

121623928 is a deficient number, since it is larger than the sum of its proper divisors (106420952).

121623928 is a wasteful number, since it uses less digits than its factorization.

121623928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15202997 (or 15202993 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 121623928 is about 11028.3238980364. The cubic root of 121623928 is about 495.4574256851.

The spelling of 121623928 in words is "one hundred twenty-one million, six hundred twenty-three thousand, nine hundred twenty-eight".