30685398 has 8 divisors (see below), whose sum is σ = 61370808. Its totient is φ = 10228464.

The previous prime is 30685387. The next prime is 30685409. The reversal of 30685398 is 89358603.

It is an interprime number because it is at equal distance from previous prime (30685387) and next prime (30685409).

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

30685398 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2557111 + ... + 2557122.

It is an arithmetic number, because the mean of its divisors is an integer number (7671351).

Almost surely, 2^30685398 is an apocalyptic number.

30685398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30685398 is a wasteful number, since it uses less digits than its factorization.

30685398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114238.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 30685398 is about 5539.4402244270. The cubic root of 30685398 is about 313.0717783577.

The spelling of 30685398 in words is "thirty million, six hundred eighty-five thousand, three hundred ninety-eight".