1656919228 has 12 divisors (see below), whose sum is σ = 2915808840. Its totient is φ = 823830992.

The previous prime is 1656919193. The next prime is 1656919249. The reversal of 1656919228 is 8229196561.

It is a super-2 number, since 2×1656919228² = 5490762656232231968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156351 + ... + 1157782.

It is an arithmetic number, because the mean of its divisors is an integer number (242984070).

Almost surely, 2^1656919228 is an apocalyptic number.

It is an amenable number.

1656919228 is a deficient number, since it is larger than the sum of its proper divisors (1258889612).

1656919228 is a wasteful number, since it uses less digits than its factorization.

1656919228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314316 (or 2314314 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 1656919228 is about 40705.2727297091. The cubic root of 1656919228 is about 1183.3152075162.

The spelling of 1656919228 in words is "one billion, six hundred fifty-six million, nine hundred nineteen thousand, two hundred twenty-eight".