121628896 has 24 divisors (see below), whose sum is σ = 239757840. Its totient is φ = 60738048.

The previous prime is 121628891. The next prime is 121628909. The reversal of 121628896 is 698826121.

It is a happy number.

It is a Smith number, since the sum of its digits (43) 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 (121628891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30405 + ... + 34171.

It is an arithmetic number, because the mean of its divisors is an integer number (9989910).

Almost surely, 2^121628896 is an apocalyptic number.

121628896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121628896 is a deficient number, since it is larger than the sum of its proper divisors (118128944).

121628896 is a wasteful number, since it uses less digits than its factorization.

121628896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786 (or 4778 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 121628896 is about 11028.5491339523. The cubic root of 121628896 is about 495.4641716136.

The spelling of 121628896 in words is "one hundred twenty-one million, six hundred twenty-eight thousand, eight hundred ninety-six".