30733140 has 48 divisors (see below), whose sum is σ = 86905728. Its totient is φ = 8114304.

The previous prime is 30733139. The next prime is 30733169. The reversal of 30733140 is 4133703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694 + ... + 8666.

It is an arithmetic number, because the mean of its divisors is an integer number (1810536).

Almost surely, 2^30733140 is an apocalyptic number.

30733140 is a gapful number since it is divisible by the number (30) 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 30733140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43452864).

30733140 is an abundant number, since it is smaller than the sum of its proper divisors (56172588).

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

30733140 is a wasteful number, since it uses less digits than its factorization.

30733140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088 (or 5086 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 30733140 is about 5543.7478297628. The cubic root of 30733140 is about 313.2340588874.

Adding to 30733140 its reverse (4133703), we get a palindrome (34866843).

The spelling of 30733140 in words is "thirty million, seven hundred thirty-three thousand, one hundred forty".