1649712428 has 36 divisors (see below), whose sum is σ = 3572760240. Its totient is φ = 652631616.

The previous prime is 1649712403. The next prime is 1649712433. The reversal of 1649712428 is 8242179461.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169583 + ... + 179046.

It is an arithmetic number, because the mean of its divisors is an integer number (99243340).

Almost surely, 2^1649712428 is an apocalyptic number.

It is an amenable number.

1649712428 is an abundant number, since it is smaller than the sum of its proper divisors (1923047812).

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

1649712428 is a wasteful number, since it uses less digits than its factorization.

1649712428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348666 (or 348651 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 1649712428 is about 40616.6521023090. The cubic root of 1649712428 is about 1181.5970971894.

The spelling of 1649712428 in words is "one billion, six hundred forty-nine million, seven hundred twelve thousand, four hundred twenty-eight".