30315420 has 72 divisors (see below), whose sum is σ = 97375824. Its totient is φ = 7607808.

The previous prime is 30315409. The next prime is 30315421. The reversal of 30315420 is 2451303.

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

It is a junction number, because it is equal to n+sod(n) for n = 30315393 and 30315402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30315421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1894 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (1352442).

Almost surely, 2^30315420 is an apocalyptic number.

30315420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30315420 is an abundant number, since it is smaller than the sum of its proper divisors (67060404).

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

30315420 is a wasteful number, since it uses less digits than its factorization.

30315420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9939 (or 9934 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30315420 is about 5505.9440607402. The cubic root of 30315420 is about 311.8084376351.

Adding to 30315420 its reverse (2451303), we get a palindrome (32766723).

The spelling of 30315420 in words is "thirty million, three hundred fifteen thousand, four hundred twenty".