1630815730 has 16 divisors (see below), whose sum is σ = 2936266200. Its totient is φ = 652148992.

The previous prime is 1630815707. The next prime is 1630815743. The reversal of 1630815730 is 375180361.

It can be written as a sum of positive squares in 4 ways, for example, as 1454430769 + 176384961 = 38137^2 + 13281^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20352 + ... + 60628.

Almost surely, 2^1630815730 is an apocalyptic number.

1630815730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1630815730 is a deficient number, since it is larger than the sum of its proper divisors (1305450470).

1630815730 is a wasteful number, since it uses less digits than its factorization.

1630815730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44333.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1630815730 is about 40383.3595680201. The cubic root of 1630815730 is about 1177.0682101679.

The spelling of 1630815730 in words is "one billion, six hundred thirty million, eight hundred fifteen thousand, seven hundred thirty".