30900806 has 4 divisors (see below), whose sum is σ = 46351212. Its totient is φ = 15450402.

The previous prime is 30900803. The next prime is 30900841. The reversal of 30900806 is 60800903.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60800903 = 83 ⋅732541.

It is a super-2 number, since 2×30900806² = 1909719622899272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30900803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7725200 + ... + 7725203.

It is an arithmetic number, because the mean of its divisors is an integer number (11587803).

Almost surely, 2^30900806 is an apocalyptic number.

30900806 is a deficient number, since it is larger than the sum of its proper divisors (15450406).

30900806 is a wasteful number, since it uses less digits than its factorization.

30900806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15450405.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 30900806 is about 5558.8493413655. The cubic root of 30900806 is about 313.8026468905.

The spelling of 30900806 in words is "thirty million, nine hundred thousand, eight hundred six".