30428162281 has 4 divisors (see below), whose sum is σ = 33194358864. Its totient is φ = 27661965700.

The previous prime is 30428162279. The next prime is 30428162291. The reversal of 30428162281 is 18226182403.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30428162281 - 2¹ = 30428162279 is a prime.

It is a super-2 number, since 2×30428162281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30428162281.

It is not an unprimeable number, because it can be changed into a prime (30428162201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383098275 + ... + 1383098296.

It is an arithmetic number, because the mean of its divisors is an integer number (8298589716).

Almost surely, 2^30428162281 is an apocalyptic number.

It is an amenable number.

30428162281 is a deficient number, since it is larger than the sum of its proper divisors (2766196583).

30428162281 is a wasteful number, since it uses less digits than its factorization.

30428162281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766196582.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 30428162281 in words is "thirty billion, four hundred twenty-eight million, one hundred sixty-two thousand, two hundred eighty-one".