30019440 has 160 divisors (see below), whose sum is σ = 103493376. Its totient is φ = 7137280.

The previous prime is 30019387. The next prime is 30019471. The reversal of 30019440 is 4491003.

It is a Cunningham number, because it is equal to 5479²-1.

It is a congruent number.

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, 219052 + ... + 219188.

Almost surely, 2^30019440 is an apocalyptic number.

30019440 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 30019440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51746688).

30019440 is an abundant number, since it is smaller than the sum of its proper divisors (73473936).

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

30019440 is a wasteful number, since it uses less digits than its factorization.

30019440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 30019440 is about 5478.9999087425. Note that the first 4 decimals coincide. The cubic root of 30019440 is about 310.7903523256.

It can be divided in two parts, 300 and 19440, that multiplied together give a cube (5832000 = 180³).

The spelling of 30019440 in words is "thirty million, nineteen thousand, four hundred forty".