1630738 has 8 divisors (see below), whose sum is σ = 2512332. Its totient is φ = 793296.

The previous prime is 1630721. The next prime is 1630763. The reversal of 1630738 is 8370361.

It can be written as a sum of positive squares in 2 ways, for example, as 1630729 + 9 = 1277^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1630738³ = 13009896120933321816, which contains 333 as substring.

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, 10945 + ... + 11092.

2^1630738 is an apocalyptic number.

1630738 is a deficient number, since it is larger than the sum of its proper divisors (881594).

1630738 is a wasteful number, since it uses less digits than its factorization.

1630738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22076.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1630738 is about 1277.0035238792. The cubic root of 1630738 is about 117.7049508900.

The spelling of 1630738 in words is "one million, six hundred thirty thousand, seven hundred thirty-eight".