1200028515 has 32 divisors (see below), whose sum is σ = 2196149760. Its totient is φ = 548131584.

The previous prime is 1200028493. The next prime is 1200028523. The reversal of 1200028515 is 5158200021.

It is not a de Polignac number, because 1200028515 - 2⁵ = 1200028483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145831 + ... + 153839.

It is an arithmetic number, because the mean of its divisors is an integer number (68629680).

Almost surely, 2^1200028515 is an apocalyptic number.

1200028515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200028515 is a deficient number, since it is larger than the sum of its proper divisors (996121245).

1200028515 is a wasteful number, since it uses less digits than its factorization.

1200028515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9451.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1200028515 is about 34641.4277275057. The cubic root of 1200028515 is about 1062.6669862574. Note that the first 3 decimals are identical.

Adding to 1200028515 its reverse (5158200021), we get a palindrome (6358228536).

The spelling of 1200028515 in words is "one billion, two hundred million, twenty-eight thousand, five hundred fifteen".