30387990 has 32 divisors (see below), whose sum is σ = 73115136. Its totient is φ = 8083040.

The previous prime is 30387983. The next prime is 30388013. The reversal of 30387990 is 9978303.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13699 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (2284848).

Almost surely, 2^30387990 is an apocalyptic number.

30387990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30387990 is an abundant number, since it is smaller than the sum of its proper divisors (42727146).

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

30387990 is a wasteful number, since it uses less digits than its factorization.

30387990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 30387990 is about 5512.5302720257. The cubic root of 30387990 is about 312.0570449607.

The spelling of 30387990 in words is "thirty million, three hundred eighty-seven thousand, nine hundred ninety".