1630440736 has 12 divisors (see below), whose sum is σ = 3209930262. Its totient is φ = 815220352.

The previous prime is 1630440733. The next prime is 1630440739. The reversal of 1630440736 is 6370440361.

It is an interprime number because it is at equal distance from previous prime (1630440733) and next prime (1630440739).

It can be written as a sum of positive squares in only one way, i.e., 882090000 + 748350736 = 29700^2 + 27356^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1630440731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25475605 + ... + 25475668.

Almost surely, 2^1630440736 is an apocalyptic number.

1630440736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1630440736 is a deficient number, since it is larger than the sum of its proper divisors (1579489526).

1630440736 is an equidigital number, since it uses as much as digits as its factorization.

1630440736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50951283 (or 50951275 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 1630440736 is about 40378.7163738522. The cubic root of 1630440736 is about 1176.9779838793.

The spelling of 1630440736 in words is "one billion, six hundred thirty million, four hundred forty thousand, seven hundred thirty-six".