247004028 has 72 divisors (see below), whose sum is σ = 663462800. Its totient is φ = 77262336.

The previous prime is 247004011. The next prime is 247004029. The reversal of 247004028 is 820400742.

247004028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247004028² = 122021979696449568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247003992 and 247004010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247004029) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 72900 + ... + 76212.

Almost surely, 2^247004028 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 247004028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331731400).

247004028 is an abundant number, since it is smaller than the sum of its proper divisors (416458772).

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

247004028 is a wasteful number, since it uses less digits than its factorization.

247004028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451 (or 3446 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 247004028 is about 15716.3617927305. The cubic root of 247004028 is about 627.4339463706.

The spelling of 247004028 in words is "two hundred forty-seven million, four thousand, twenty-eight".