30545840 has 80 divisors (see below), whose sum is σ = 79869888. Its totient is φ = 10779648.

The previous prime is 30545839. The next prime is 30545843. The reversal of 30545840 is 4854503.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (30545843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23282 + ... + 24558.

Almost surely, 2^30545840 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 30545840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39934944).

30545840 is an abundant number, since it is smaller than the sum of its proper divisors (49324048).

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

30545840 is a wasteful number, since it uses less digits than its factorization.

30545840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 30545840 is about 5526.8291089919. The cubic root of 30545840 is about 312.5964374364.

The spelling of 30545840 in words is "thirty million, five hundred forty-five thousand, eight hundred forty".