153023640 has 128 divisors (see below), whose sum is σ = 572382720. Its totient is φ = 31795200.

The previous prime is 153023621. The next prime is 153023641. The reversal of 153023640 is 46320351.

It is a happy number.

153023640 is digitally balanced in base 2, 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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 153023640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153023641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 960 + ... + 17520.

It is an arithmetic number, because the mean of its divisors is an integer number (4471740).

Almost surely, 2^153023640 is an apocalyptic number.

153023640 is a gapful number since it is divisible by the number (10) 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 153023640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286191360).

153023640 is an abundant number, since it is smaller than the sum of its proper divisors (419359080).

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

153023640 is a wasteful number, since it uses less digits than its factorization.

153023640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593 (or 16589 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 153023640 is about 12370.2724303065. The cubic root of 153023640 is about 534.8756691316.

Adding to 153023640 its reverse (46320351), we get a palindrome (199343991).

The spelling of 153023640 in words is "one hundred fifty-three million, twenty-three thousand, six hundred forty".