15228730 has 32 divisors (see below), whose sum is σ = 30119040. Its totient is φ = 5497920.

The previous prime is 15228727. The next prime is 15228743. The reversal of 15228730 is 3782251.

15228730 = 474² + 475² + ... + 533².

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, 17956 + ... + 18784.

It is an arithmetic number, because the mean of its divisors is an integer number (941220).

Almost surely, 2^15228730 is an apocalyptic number.

15228730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15228730 is a deficient number, since it is larger than the sum of its proper divisors (14890310).

15228730 is a wasteful number, since it uses less digits than its factorization.

15228730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 15228730 is about 3902.4005432554. The cubic root of 15228730 is about 247.8684374165.

It can be divided in two parts, 152 and 28730, that added together give a palindrome (28882).

The spelling of 15228730 in words is "fifteen million, two hundred twenty-eight thousand, seven hundred thirty".