30820069 has 36 divisors (see below), whose sum is σ = 39716460. Its totient is φ = 23802240.

The previous prime is 30820057. The next prime is 30820079. The reversal of 30820069 is 96002803.

30820069 = T₁₀₉₇ + T₁₀₉₈ + ... + T₁₁₄₅.

It can be written as a sum of positive squares in 2 ways, for example, as 7491169 + 23328900 = 2737^2 + 4830^2 .

It is not a de Polignac number, because 30820069 - 2⁷ = 30819941 is a prime.

It is a super-2 number, since 2×30820069² = 1899753306329522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820019) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 751689 + ... + 751729.

It is an arithmetic number, because the mean of its divisors is an integer number (1103235).

Almost surely, 2^30820069 is an apocalyptic number.

It is an amenable number.

30820069 is a deficient number, since it is larger than the sum of its proper divisors (8896391).

30820069 is a wasteful number, since it uses less digits than its factorization.

30820069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30820069 is about 5551.5825671605. The cubic root of 30820069 is about 313.5291094544.

The spelling of 30820069 in words is "thirty million, eight hundred twenty thousand, sixty-nine".