153721740 has 24 divisors (see below), whose sum is σ = 430421040. Its totient is φ = 40992448.

The previous prime is 153721709. The next prime is 153721741. The reversal of 153721740 is 47127351.

153721740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 153721698 and 153721707.

It is not an unprimeable number, because it can be changed into a prime (153721741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280955 + ... + 1281074.

It is an arithmetic number, because the mean of its divisors is an integer number (17934210).

Almost surely, 2^153721740 is an apocalyptic number.

153721740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153721740 is an abundant number, since it is smaller than the sum of its proper divisors (276699300).

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

153721740 is a wasteful number, since it uses less digits than its factorization.

153721740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562041 (or 2562039 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 153721740 is about 12398.4571620827. The cubic root of 153721740 is about 535.6878101455.

The spelling of 153721740 in words is "one hundred fifty-three million, seven hundred twenty-one thousand, seven hundred forty".