303630140 has 72 divisors (see below), whose sum is σ = 720013056. Its totient is φ = 107395200.

The previous prime is 303630137. The next prime is 303630143. The reversal of 303630140 is 41036303.

It is an interprime number because it is at equal distance from previous prime (303630137) and next prime (303630143).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303630143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87845 + ... + 91235.

Almost surely, 2^303630140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303630140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360006528).

303630140 is an abundant number, since it is smaller than the sum of its proper divisors (416382916).

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

303630140 is a wasteful number, since it uses less digits than its factorization.

303630140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459 (or 3446 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 303630140 is about 17424.9860832082. The cubic root of 303630140 is about 672.1222820510.

Adding to 303630140 its reverse (41036303), we get a palindrome (344666443).

The spelling of 303630140 in words is "three hundred three million, six hundred thirty thousand, one hundred forty".