30621490 has 16 divisors (see below), whose sum is σ = 56897280. Its totient is φ = 11853360.

The previous prime is 30621473. The next prime is 30621499. The reversal of 30621490 is 9412603.

It is not an unprimeable number, because it can be changed into a prime (30621499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49080 + ... + 49699.

It is an arithmetic number, because the mean of its divisors is an integer number (3556080).

Almost surely, 2^30621490 is an apocalyptic number.

30621490 is a deficient number, since it is larger than the sum of its proper divisors (26275790).

30621490 is a wasteful number, since it uses less digits than its factorization.

30621490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98817.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30621490 is about 5533.6687649334. The cubic root of 30621490 is about 312.8542840599.

The spelling of 30621490 in words is "thirty million, six hundred twenty-one thousand, four hundred ninety".