1630720844 has 12 divisors (see below), whose sum is σ = 2889885600. Its totient is φ = 805039248.

The previous prime is 1630720831. The next prime is 1630720859. The reversal of 1630720844 is 4480270361.

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, 2579939 + ... + 2580570.

It is an arithmetic number, because the mean of its divisors is an integer number (240823800).

Almost surely, 2^1630720844 is an apocalyptic number.

It is an amenable number.

1630720844 is a deficient number, since it is larger than the sum of its proper divisors (1259164756).

1630720844 is a wasteful number, since it uses less digits than its factorization.

1630720844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160592 (or 5160590 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1630720844 is about 40382.1847353508. The cubic root of 1630720844 is about 1177.0453812122.

The spelling of 1630720844 in words is "one billion, six hundred thirty million, seven hundred twenty thousand, eight hundred forty-four".