121723488 has 72 divisors (see below), whose sum is σ = 355537728. Its totient is φ = 39474432.

The previous prime is 121723477. The next prime is 121723507. The reversal of 121723488 is 884327121.

121723488 is a `hidden beast` number, since 1 + 2 + 172 + 3 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×121723488² = 29633215061772288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4945 + ... + 16367.

It is an arithmetic number, because the mean of its divisors is an integer number (4938024).

Almost surely, 2^121723488 is an apocalyptic number.

121723488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121723488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177768864).

121723488 is an abundant number, since it is smaller than the sum of its proper divisors (233814240).

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

121723488 is a wasteful number, since it uses less digits than its factorization.

121723488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476 (or 11465 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 121723488 is about 11032.8368065516. The cubic root of 121723488 is about 495.5925807995.

The spelling of 121723488 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, four hundred eighty-eight".