30400537638 has 32 divisors (see below), whose sum is σ = 63453341952. Its totient is φ = 9691589600.

The previous prime is 30400537631. The next prime is 30400537693. The reversal of 30400537638 is 83673500403.

It is a junction number, because it is equal to n+sod(n) for n = 30400537596 and 30400537605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400537631) 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 in 15 ways as a sum of consecutive naturals, for example, 1648348 + ... + 1666688.

It is an arithmetic number, because the mean of its divisors is an integer number (1982916936).

Almost surely, 2^30400537638 is an apocalyptic number.

30400537638 is an abundant number, since it is smaller than the sum of its proper divisors (33052804314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30400537638 is a wasteful number, since it uses less digits than its factorization.

30400537638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30380.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 30400537638 in words is "thirty billion, four hundred million, five hundred thirty-seven thousand, six hundred thirty-eight".