30522140 has 48 divisors (see below), whose sum is σ = 74045664. Its totient is φ = 10444800.

The previous prime is 30522139. The next prime is 30522169. The reversal of 30522140 is 4122503.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 341 + ... + 7820.

It is an arithmetic number, because the mean of its divisors is an integer number (1542618).

Almost surely, 2^30522140 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 30522140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37022832).

30522140 is an abundant number, since it is smaller than the sum of its proper divisors (43523524).

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

30522140 is a wasteful number, since it uses less digits than its factorization.

30522140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198 (or 8196 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30522140 is about 5524.6846063825. The cubic root of 30522140 is about 312.5155704242.

Adding to 30522140 its reverse (4122503), we get a palindrome (34644643).

The spelling of 30522140 in words is "thirty million, five hundred twenty-two thousand, one hundred forty".