30978357140 has 24 divisors (see below), whose sum is σ = 65069664072. Its totient is φ = 12388464000.

The previous prime is 30978357103. The next prime is 30978357187. The reversal of 30978357140 is 4175387903.

It can be written as a sum of positive squares in 4 ways, for example, as 4240874884 + 26737482256 = 65122^2 + 163516^2 .

It is a super-2 number, since 2×30978357140² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90611 + ... + 264890.

It is an arithmetic number, because the mean of its divisors is an integer number (2711236003).

Almost surely, 2^30978357140 is an apocalyptic number.

It is an amenable number.

30978357140 is an abundant number, since it is smaller than the sum of its proper divisors (34091306932).

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

30978357140 is a wasteful number, since it uses less digits than its factorization.

30978357140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359867 (or 359865 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 30978357140 in words is "thirty billion, nine hundred seventy-eight million, three hundred fifty-seven thousand, one hundred forty".