30139776 has 224 divisors, whose sum is σ = 100337400. Its totient is φ = 8957952.

The previous prime is 30139771. The next prime is 30139777. The reversal of 30139776 is 67793103.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30139776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30139771) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1586295 + ... + 1586313.

Almost surely, 2^30139776 is an apocalyptic number.

30139776 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30139776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50168700).

30139776 is an abundant number, since it is smaller than the sum of its proper divisors (70197624).

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

30139776 is an equidigital number, since it uses as much as digits as its factorization.

30139776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 30139776 is about 5489.9704917240. The cubic root of 30139776 is about 311.2050769829.

The spelling of 30139776 in words is "thirty million, one hundred thirty-nine thousand, seven hundred seventy-six".