1214591728 has 40 divisors (see below), whose sum is σ = 2806391808. Its totient is φ = 497906112.

The previous prime is 1214591699. The next prime is 1214591737. The reversal of 1214591728 is 8271954121.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233176 + ... + 238327.

Almost surely, 2^1214591728 is an apocalyptic number.

It is an amenable number.

1214591728 is an abundant number, since it is smaller than the sum of its proper divisors (1591800080).

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

1214591728 is a wasteful number, since it uses less digits than its factorization.

1214591728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471541 (or 471535 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 1214591728 is about 34850.9932139674. The cubic root of 1214591728 is about 1066.9484569741.

The spelling of 1214591728 in words is "one billion, two hundred fourteen million, five hundred ninety-one thousand, seven hundred twenty-eight".