30797780 has 24 divisors (see below), whose sum is σ = 69650952. Its totient is φ = 11371392.

The previous prime is 30797777. The next prime is 30797807. The reversal of 30797780 is 8779703.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1008016 + 29789764 = 1004^2 + 5458^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58967 + ... + 59486.

It is an arithmetic number, because the mean of its divisors is an integer number (2902123).

Almost surely, 2^30797780 is an apocalyptic number.

It is an amenable number.

30797780 is an abundant number, since it is smaller than the sum of its proper divisors (38853172).

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

30797780 is a wasteful number, since it uses less digits than its factorization.

30797780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118475 (or 118473 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 30797780 is about 5549.5747584838. The cubic root of 30797780 is about 313.4535100603.

The spelling of 30797780 in words is "thirty million, seven hundred ninety-seven thousand, seven hundred eighty".