30640898 has 16 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 14919456.

The previous prime is 30640891. The next prime is 30640913. The reversal of 30640898 is 89804603.

It is a super-3 number, since 3×30640898³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30640891) 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 7 ways as a sum of consecutive naturals, for example, 21203 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^30640898 is an apocalyptic number.

30640898 is a deficient number, since it is larger than the sum of its proper divisors (16533502).

30640898 is a wasteful number, since it uses less digits than its factorization.

30640898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 30640898 is about 5535.4221157921. The cubic root of 30640898 is about 312.9203661219.

The spelling of 30640898 in words is "thirty million, six hundred forty thousand, eight hundred ninety-eight".