30111040 has 56 divisors (see below), whose sum is σ = 72740520. Its totient is φ = 11870208.

The previous prime is 30111023. The next prime is 30111041. The reversal of 30111040 is 4011103.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7529536 + 22581504 = 2744^2 + 4752^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30111041) 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, 22716 + ... + 24004.

Almost surely, 2^30111040 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 30111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36370260).

30111040 is an abundant number, since it is smaller than the sum of its proper divisors (42629480).

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

30111040 is a wasteful number, since it uses less digits than its factorization.

30111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30111040 is about 5487.3527315091. The cubic root of 30111040 is about 311.1061420219.

Adding to 30111040 its reverse (4011103), we get a palindrome (34122143).

The spelling of 30111040 in words is "thirty million, one hundred eleven thousand, forty".