15420030 has 16 divisors (see below), whose sum is σ = 37008144. Its totient is φ = 4112000.

The previous prime is 15420017. The next prime is 15420043. The reversal of 15420030 is 3002451.

It is an interprime number because it is at equal distance from previous prime (15420017) and next prime (15420043).

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 = 15419991 and 15420009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256971 + ... + 257030.

It is an arithmetic number, because the mean of its divisors is an integer number (2313009).

Almost surely, 2^15420030 is an apocalyptic number.

15420030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15420030 is an abundant number, since it is smaller than the sum of its proper divisors (21588114).

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

15420030 is a wasteful number, since it uses less digits than its factorization.

15420030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514011.

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

The square root of 15420030 is about 3926.8346030868. The cubic root of 15420030 is about 248.9020114107.

Adding to 15420030 its reverse (3002451), we get a palindrome (18422481).

The spelling of 15420030 in words is "fifteen million, four hundred twenty thousand, thirty".