30161040 has 160 divisors (see below), whose sum is σ = 115159296. Its totient is φ = 6359040.

The previous prime is 30161039. The next prime is 30161059. The reversal of 30161040 is 4016103.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21150 + ... + 22530.

Almost surely, 2^30161040 is an apocalyptic number.

30161040 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 30161040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57579648).

30161040 is an abundant number, since it is smaller than the sum of its proper divisors (84998256).

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

30161040 is a wasteful number, since it uses less digits than its factorization.

30161040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 30161040 is about 5491.9067726974. The cubic root of 30161040 is about 311.2782461745.

Adding to 30161040 its reverse (4016103), we get a palindrome (34177143).

The spelling of 30161040 in words is "thirty million, one hundred sixty-one thousand, forty".