30828780 has 36 divisors (see below), whose sum is σ = 93514512. Its totient is φ = 8220960.

The previous prime is 30828779. The next prime is 30828781. The reversal of 30828780 is 8782803.

It is an interprime number because it is at equal distance from previous prime (30828779) and next prime (30828781).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30828781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85456 + ... + 85815.

Almost surely, 2^30828780 is an apocalyptic number.

30828780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30828780 is an abundant number, since it is smaller than the sum of its proper divisors (62685732).

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

30828780 is a wasteful number, since it uses less digits than its factorization.

30828780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171286 (or 171281 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 30828780 is about 5552.3670627940. The cubic root of 30828780 is about 313.5586453477.

The spelling of 30828780 in words is "thirty million, eight hundred twenty-eight thousand, seven hundred eighty".