30042506640 has 120 divisors (see below), whose sum is σ = 98291708928. Its totient is φ = 7589664000.

The previous prime is 30042506629. The next prime is 30042506653. The reversal of 30042506640 is 4660524003.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30042506598 and 30042506607.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86736 + ... + 260015.

Almost surely, 2^30042506640 is an apocalyptic number.

30042506640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30042506640 is an abundant number, since it is smaller than the sum of its proper divisors (68249202288).

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

30042506640 is a wasteful number, since it uses less digits than its factorization.

30042506640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346805 (or 346780 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 30042506640 in words is "thirty billion, forty-two million, five hundred six thousand, six hundred forty".