1630397644 has 6 divisors (see below), whose sum is σ = 2853195884. Its totient is φ = 815198820.

The previous prime is 1630397623. The next prime is 1630397653. The reversal of 1630397644 is 4467930361.

It is a self number, because there is not a number n which added to its sum of digits gives 1630397644.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203799702 + ... + 203799709.

Almost surely, 2^1630397644 is an apocalyptic number.

It is an amenable number.

1630397644 is a deficient number, since it is larger than the sum of its proper divisors (1222798240).

1630397644 is a wasteful number, since it uses less digits than its factorization.

1630397644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407599415 (or 407599413 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 1630397644 is about 40378.1827723834. The cubic root of 1630397644 is about 1176.9676147439.

The spelling of 1630397644 in words is "one billion, six hundred thirty million, three hundred ninety-seven thousand, six hundred forty-four".