1630720746 has 24 divisors (see below), whose sum is σ = 3686847840. Its totient is φ = 519939816.

The previous prime is 1630720703. The next prime is 1630720753. The reversal of 1630720746 is 6470270361.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1630720746.

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, 1969056 + ... + 1969883.

It is an arithmetic number, because the mean of its divisors is an integer number (153618660).

Almost surely, 2^1630720746 is an apocalyptic number.

1630720746 is an abundant number, since it is smaller than the sum of its proper divisors (2056127094).

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

1630720746 is a wasteful number, since it uses less digits than its factorization.

1630720746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938970 (or 3938967 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 1630720746 is about 40382.1835219444. The cubic root of 1630720746 is about 1177.0453576336.

The spelling of 1630720746 in words is "one billion, six hundred thirty million, seven hundred twenty thousand, seven hundred forty-six".