230021440 has 112 divisors (see below), whose sum is σ = 604381824. Its totient is φ = 82688000.

The previous prime is 230021437. The next prime is 230021443. The reversal of 230021440 is 44120032.

230021440 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (230021437) and next prime (230021443).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230021443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355197 + ... + 355843.

Almost surely, 2^230021440 is an apocalyptic number.

230021440 is a gapful number since it is divisible by the number (20) 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 230021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302190912).

230021440 is an abundant number, since it is smaller than the sum of its proper divisors (374360384).

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

230021440 is a wasteful number, since it uses less digits than its factorization.

230021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 230021440 is about 15166.4577274985. The cubic root of 230021440 is about 612.7116047989.

Adding to 230021440 its reverse (44120032), we get a palindrome (274141472).

It can be divided in two parts, 23002 and 1440, that added together give a palindrome (24442).

The spelling of 230021440 in words is "two hundred thirty million, twenty-one thousand, four hundred forty".