30401781387 has 8 divisors (see below), whose sum is σ = 40542222336. Its totient is φ = 20264597352.

The previous prime is 30401781373. The next prime is 30401781427. The reversal of 30401781387 is 78318710403.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30401781387 - 2⁷ = 30401781259 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (30401781587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792363 + ... + 829844.

It is an arithmetic number, because the mean of its divisors is an integer number (5067777792).

Almost surely, 2^30401781387 is an apocalyptic number.

30401781387 is a deficient number, since it is larger than the sum of its proper divisors (10140440949).

30401781387 is a wasteful number, since it uses less digits than its factorization.

30401781387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628457.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 30401781387 in words is "thirty billion, four hundred one million, seven hundred eighty-one thousand, three hundred eighty-seven".