30678020 has 12 divisors (see below), whose sum is σ = 64423884. Its totient is φ = 12271200.

The previous prime is 30678019. The next prime is 30678061. The reversal of 30678020 is 2087603.

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 25080064 = 2366^2 + 5008^2 .

It is a super-2 number, since 2×30678020² = 1882281822240800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766931 + ... + 766970.

It is an arithmetic number, because the mean of its divisors is an integer number (5368657).

Almost surely, 2^30678020 is an apocalyptic number.

It is an amenable number.

30678020 is an abundant number, since it is smaller than the sum of its proper divisors (33745864).

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

30678020 is a wasteful number, since it uses less digits than its factorization.

30678020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533910 (or 1533908 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30678020 is about 5538.7742326258. The cubic root of 30678020 is about 313.0466846771.

The spelling of 30678020 in words is "thirty million, six hundred seventy-eight thousand, twenty".