30790020 has 24 divisors (see below), whose sum is σ = 86212224. Its totient is φ = 8210656.

The previous prime is 30790003. The next prime is 30790027. The reversal of 30790020 is 2009703.

It is not an unprimeable number, because it can be changed into a prime (30790027) 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, 256524 + ... + 256643.

It is an arithmetic number, because the mean of its divisors is an integer number (3592176).

Almost surely, 2^30790020 is an apocalyptic number.

30790020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30790020 is an abundant number, since it is smaller than the sum of its proper divisors (55422204).

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

30790020 is a wasteful number, since it uses less digits than its factorization.

30790020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513179 (or 513177 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 30790020 is about 5548.8755617692. The cubic root of 30790020 is about 313.4271812843.

Adding to 30790020 its reverse (2009703), we get a palindrome (32799723).

The spelling of 30790020 in words is "thirty million, seven hundred ninety thousand, twenty".