1089940228 has 72 divisors (see below), whose sum is σ = 2168760776. Its totient is φ = 476098560.

The previous prime is 1089940219. The next prime is 1089940231. The reversal of 1089940228 is 8220499801.

It can be written as a sum of positive squares in 12 ways, for example, as 814645764 + 275294464 = 28542^2 + 16592^2 .

It is a super-2 number, since 2×1089940228² = 2375939401225383968, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 3234076 + ... + 3234412.

Almost surely, 2^1089940228 is an apocalyptic number.

It is an amenable number.

1089940228 is a deficient number, since it is larger than the sum of its proper divisors (1078820548).

1089940228 is a wasteful number, since it uses less digits than its factorization.

1089940228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1089940228 is about 33014.2428051894. The cubic root of 1089940228 is about 1029.1236546364.

The spelling of 1089940228 in words is "one billion, eighty-nine million, nine hundred forty thousand, two hundred twenty-eight".