247977072 has 80 divisors (see below), whose sum is σ = 813479680. Its totient is φ = 70849728.

The previous prime is 247977049. The next prime is 247977077. The reversal of 247977072 is 270779742.

It is a happy number.

It is a super-2 number, since 2×247977072² = 122985256475386368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247977077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37978 + ... + 44025.

It is an arithmetic number, because the mean of its divisors is an integer number (10168496).

Almost surely, 2^247977072 is an apocalyptic number.

It is an amenable number.

247977072 is an abundant number, since it is smaller than the sum of its proper divisors (565502608).

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

247977072 is a wasteful number, since it uses less digits than its factorization.

247977072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82027 (or 82015 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The square root of 247977072 is about 15747.2877664695. The cubic root of 247977072 is about 628.2567681677.

The spelling of 247977072 in words is "two hundred forty-seven million, nine hundred seventy-seven thousand, seventy-two".