30139760 has 80 divisors (see below), whose sum is σ = 80994816. Its totient is φ = 10216704.

The previous prime is 30139741. The next prime is 30139771. The reversal of 30139760 is 6793103.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59669 + ... + 60171.

Almost surely, 2^30139760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30139760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40497408).

30139760 is an abundant number, since it is smaller than the sum of its proper divisors (50855056).

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

30139760 is a wasteful number, since it uses less digits than its factorization.

30139760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 30139760 is about 5489.9690345211. The cubic root of 30139760 is about 311.2050219141.

The spelling of 30139760 in words is "thirty million, one hundred thirty-nine thousand, seven hundred sixty".