1611996228 has 30 divisors (see below), whose sum is σ = 4214077406. Its totient is φ = 537331968.

The previous prime is 1611996227. The next prime is 1611996241. The reversal of 1611996228 is 8226991161.

1611996228 is a `hidden beast` number, since 1 + 6 + 1 + 19 + 9 + 622 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1562462784 + 49533444 = 39528^2 + 7038^2 .

It is not an unprimeable number, because it can be changed into a prime (1611996223) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2487325 + ... + 2487972.

Almost surely, 2^1611996228 is an apocalyptic number.

1611996228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1611996228 is an abundant number, since it is smaller than the sum of its proper divisors (2602081178).

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

1611996228 is a wasteful number, since it uses less digits than its factorization.

1611996228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975313 (or 4975302 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 1611996228 is about 40149.6728255661. The cubic root of 1611996228 is about 1172.5229187362.

The spelling of 1611996228 in words is "one billion, six hundred eleven million, nine hundred ninety-six thousand, two hundred twenty-eight".