30420450 has 36 divisors (see below), whose sum is σ = 81730818. Its totient is φ = 8112000.

The previous prime is 30420433. The next prime is 30420457. The reversal of 30420450 is 5402403.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29778849 + 641601 = 5457^2 + 801^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30420457) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33351 + ... + 34250.

Almost surely, 2^30420450 is an apocalyptic number.

30420450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30420450 is an abundant number, since it is smaller than the sum of its proper divisors (51310368).

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

30420450 is a wasteful number, since it uses less digits than its factorization.

30420450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67619 (or 67611 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 30420450 is about 5515.4736877262. The cubic root of 30420450 is about 312.1681169898.

Adding to 30420450 its reverse (5402403), we get a palindrome (35822853).

The spelling of 30420450 in words is "thirty million, four hundred twenty thousand, four hundred fifty".