30420015 has 16 divisors (see below), whose sum is σ = 48811488. Its totient is φ = 16177536.

The previous prime is 30420001. The next prime is 30420023. The reversal of 30420015 is 51002403.

It is not a de Polignac number, because 30420015 - 2¹¹ = 30417967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 30419976 and 30420003.

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, 2877 + ... + 8313.

It is an arithmetic number, because the mean of its divisors is an integer number (3050718).

Almost surely, 2^30420015 is an apocalyptic number.

30420015 is a deficient number, since it is larger than the sum of its proper divisors (18391473).

30420015 is a wasteful number, since it uses less digits than its factorization.

30420015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30420015 is about 5515.4342530756. The cubic root of 30420015 is about 312.1666290239.

Adding to 30420015 its reverse (51002403), we get a palindrome (81422418).

The spelling of 30420015 in words is "thirty million, four hundred twenty thousand, fifteen".