1630398 has 32 divisors (see below), whose sum is σ = 4066560. Its totient is φ = 423360.

The previous prime is 1630393. The next prime is 1630399. The reversal of 1630398 is 8930361.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (127080).

2^1630398 is an apocalyptic number.

1630398 is an abundant number, since it is smaller than the sum of its proper divisors (2436162).

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

1630398 is a wasteful number, since it uses less digits than its factorization.

1630398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1630398 is about 1276.8703927964. The cubic root of 1630398 is about 117.6967700408.

The spelling of 1630398 in words is "one million, six hundred thirty thousand, three hundred ninety-eight".