30727990 has 16 divisors (see below), whose sum is σ = 55849248. Its totient is φ = 12171456.

The previous prime is 30727987. The next prime is 30728017. The reversal of 30727990 is 9972703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13887 + ... + 15946.

It is an arithmetic number, because the mean of its divisors is an integer number (3490578).

Almost surely, 2^30727990 is an apocalyptic number.

30727990 is a deficient number, since it is larger than the sum of its proper divisors (25121258).

30727990 is a wasteful number, since it uses less digits than its factorization.

30727990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29943.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 30727990 is about 5543.2833230857. The cubic root of 30727990 is about 313.2165615374.

The spelling of 30727990 in words is "thirty million, seven hundred twenty-seven thousand, nine hundred ninety".