30705672540 has 48 divisors (see below), whose sum is σ = 87259116672. Its totient is φ = 8065966656.

The previous prime is 30705672539. The next prime is 30705672553. The reversal of 30705672540 is 4527650703.

It is a super-2 number, since 2×30705672540² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3815094 + ... + 3823133.

It is an arithmetic number, because the mean of its divisors is an integer number (1817898264).

Almost surely, 2^30705672540 is an apocalyptic number.

30705672540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30705672540 is an abundant number, since it is smaller than the sum of its proper divisors (56553444132).

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

30705672540 is a wasteful number, since it uses less digits than its factorization.

30705672540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638306 (or 7638304 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 30705672540 in words is "thirty billion, seven hundred five million, six hundred seventy-two thousand, five hundred forty".