30421290 has 64 divisors (see below), whose sum is σ = 76723200. Its totient is φ = 7709184.

The previous prime is 30421271. The next prime is 30421291. The reversal of 30421290 is 9212403.

It is not an unprimeable number, because it can be changed into a prime (30421291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63271 + ... + 63749.

It is an arithmetic number, because the mean of its divisors is an integer number (1198800).

Almost surely, 2^30421290 is an apocalyptic number.

30421290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30421290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38361600).

30421290 is an abundant number, since it is smaller than the sum of its proper divisors (46301910).

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

30421290 is a wasteful number, since it uses less digits than its factorization.

30421290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591.

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

The square root of 30421290 is about 5515.5498365983. The cubic root of 30421290 is about 312.1709902632.

Adding to 30421290 its reverse (9212403), we get a palindrome (39633693).

The spelling of 30421290 in words is "thirty million, four hundred twenty-one thousand, two hundred ninety".