30631642 has 8 divisors (see below), whose sum is σ = 46240596. Its totient is φ = 15218112.

The previous prime is 30631631. The next prime is 30631649. The reversal of 30631642 is 24613603.

It can be written as a sum of positive squares in 2 ways, for example, as 25010001 + 5621641 = 5001^2 + 2371^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30631649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48463 + ... + 49090.

Almost surely, 2^30631642 is an apocalyptic number.

30631642 is a deficient number, since it is larger than the sum of its proper divisors (15608954).

30631642 is a wasteful number, since it uses less digits than its factorization.

30631642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97712.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 30631642 is about 5534.5859827091. The cubic root of 30631642 is about 312.8888539623. Note that the first 4 decimals are identical.

The spelling of 30631642 in words is "thirty million, six hundred thirty-one thousand, six hundred forty-two".