30028077 has 20 divisors (see below), whose sum is σ = 45019260. Its totient is φ = 19946304.

The previous prime is 30028027. The next prime is 30028091. The reversal of 30028077 is 77082003.

It can be written as a sum of positive squares in 2 ways, for example, as 9696996 + 20331081 = 3114^2 + 4509^2 .

It is not a de Polignac number, because 30028077 - 2²³ = 21639469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 30028077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31033 + ... + 31985.

It is an arithmetic number, because the mean of its divisors is an integer number (2250963).

Almost surely, 2^30028077 is an apocalyptic number.

It is an amenable number.

30028077 is a deficient number, since it is larger than the sum of its proper divisors (14991183).

30028077 is an equidigital number, since it uses as much as digits as its factorization.

30028077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 30028077 is about 5479.7880433462. The cubic root of 30028077 is about 310.8201556673.

The spelling of 30028077 in words is "thirty million, twenty-eight thousand, seventy-seven".