30403040 has 96 divisors (see below), whose sum is σ = 77202720. Its totient is φ = 11280384.

The previous prime is 30403039. The next prime is 30403057. The reversal of 30403040 is 4030403.

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, 221852 + ... + 221988.

It is an arithmetic number, because the mean of its divisors is an integer number (804195).

Almost surely, 2^30403040 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 30403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38601360).

30403040 is an abundant number, since it is smaller than the sum of its proper divisors (46799680).

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

30403040 is a wasteful number, since it uses less digits than its factorization.

30403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 30403040 is about 5513.8951749195. The cubic root of 30403040 is about 312.1085530665.

Adding to 30403040 its reverse (4030403), we get a palindrome (34433443).

The spelling of 30403040 in words is "thirty million, four hundred three thousand, forty".