30159840 has 96 divisors (see below), whose sum is σ = 100033920. Its totient is φ = 7617024.

The previous prime is 30159839. The next prime is 30159851. The reversal of 30159840 is 4895103.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 30159798 and 30159807.

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, 7467 + ... + 10773.

It is an arithmetic number, because the mean of its divisors is an integer number (1042020).

Almost surely, 2^30159840 is an apocalyptic number.

30159840 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 30159840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50016960).

30159840 is an abundant number, since it is smaller than the sum of its proper divisors (69874080).

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

30159840 is a wasteful number, since it uses less digits than its factorization.

30159840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 30159840 is about 5491.7975199383. The cubic root of 30159840 is about 311.2741179034.

The spelling of 30159840 in words is "thirty million, one hundred fifty-nine thousand, eight hundred forty".