30660690 has 64 divisors (see below), whose sum is σ = 79004160. Its totient is φ = 7587840.

The previous prime is 30660689. The next prime is 30660713. The reversal of 30660690 is 9606603.

It is a super-2 number, since 2×30660690² = 1880155822552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 39910 + ... + 40670.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^30660690 is an apocalyptic number.

30660690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30660690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39502080).

30660690 is an abundant number, since it is smaller than the sum of its proper divisors (48343470).

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

30660690 is a wasteful number, since it uses less digits than its factorization.

30660690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 30660690 is about 5537.2095860641. The cubic root of 30660690 is about 312.9877269291.

The spelling of 30660690 in words is "thirty million, six hundred sixty thousand, six hundred ninety".