30761428 has 6 divisors (see below), whose sum is σ = 53832506. Its totient is φ = 15380712.

The previous prime is 30761413. The next prime is 30761429. The reversal of 30761428 is 82416703.

It can be written as a sum of positive squares in only one way, i.e., 30603024 + 158404 = 5532^2 + 398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30761428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30761429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845175 + ... + 3845182.

Almost surely, 2^30761428 is an apocalyptic number.

It is an amenable number.

30761428 is a deficient number, since it is larger than the sum of its proper divisors (23071078).

30761428 is a wasteful number, since it uses less digits than its factorization.

30761428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690361 (or 7690359 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 30761428 is about 5546.2985855433. The cubic root of 30761428 is about 313.3301337634.

The spelling of 30761428 in words is "thirty million, seven hundred sixty-one thousand, four hundred twenty-eight".