30880144 has 40 divisors (see below), whose sum is σ = 61355448. Its totient is φ = 15052800.

The previous prime is 30880139. The next prime is 30880147. The reversal of 30880144 is 44108803.

It can be written as a sum of positive squares in 4 ways, for example, as 21344400 + 9535744 = 4620^2 + 3088^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30880147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156654 + ... + 156850.

Almost surely, 2^30880144 is an apocalyptic number.

It is an amenable number.

30880144 is a deficient number, since it is larger than the sum of its proper divisors (30475304).

30880144 is a wasteful number, since it uses less digits than its factorization.

30880144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 30880144 is about 5556.9905524483. The cubic root of 30880144 is about 313.7326893197.

Adding to 30880144 its reverse (44108803), we get a palindrome (74988947).

The spelling of 30880144 in words is "thirty million, eight hundred eighty thousand, one hundred forty-four".