1128691216 has 45 divisors (see below), whose sum is σ = 2257485069. Its totient is φ = 546674112.

The previous prime is 1128691159. The next prime is 1128691243. The reversal of 1128691216 is 6121968211.

The square root of 1128691216 is 33596.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1009968400 + 118722816 = 31780^2 + 10896^2 .

It is a super-2 number, since 2×1128691216² = 2547887722151117312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4972095 + ... + 4972321.

Almost surely, 2^1128691216 is an apocalyptic number.

1128691216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1128691216 is the 33596-th square number.

It is an amenable number.

1128691216 is an abundant number, since it is smaller than the sum of its proper divisors (1128793853).

1128691216 is an frugal number, since it uses more digits than its factorization.

1128691216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 266 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The cubic root of 1128691216 is about 1041.1781569394.

The spelling of 1128691216 in words is "one billion, one hundred twenty-eight million, six hundred ninety-one thousand, two hundred sixteen".