30638997 has 12 divisors (see below), whose sum is σ = 45452940. Its totient is φ = 19873728.

The previous prime is 30638987. The next prime is 30638999. The reversal of 30638997 is 79983603.

It is a happy number.

30638997 is a `hidden beast` number, since 3 + 0 + 638 + 9 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20848356 + 9790641 = 4566^2 + 3129^2 .

It is not a de Polignac number, because 30638997 - 2¹⁵ = 30606229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30638999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45672 + ... + 46337.

It is an arithmetic number, because the mean of its divisors is an integer number (3787745).

Almost surely, 2^30638997 is an apocalyptic number.

30638997 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30638997 is a deficient number, since it is larger than the sum of its proper divisors (14813943).

30638997 is a wasteful number, since it uses less digits than its factorization.

30638997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92052 (or 92049 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 30638997 is about 5535.2504008401. The cubic root of 30638997 is about 312.9138946632.

The spelling of 30638997 in words is "thirty million, six hundred thirty-eight thousand, nine hundred ninety-seven".