247747998 has 16 divisors (see below), whose sum is σ = 506039040. Its totient is φ = 80825496.

The previous prime is 247747979. The next prime is 247747999. The reversal of 247747998 is 899747742.

It is a happy number.

247747998 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 2×247747998² = 122758141026016008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247747999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438988 + ... + 439551.

It is an arithmetic number, because the mean of its divisors is an integer number (31627440).

Almost surely, 2^247747998 is an apocalyptic number.

247747998 is an abundant number, since it is smaller than the sum of its proper divisors (258291042).

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

247747998 is a wasteful number, since it uses less digits than its factorization.

247747998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878591.

The product of its digits is 7112448, while the sum is 57.

The square root of 247747998 is about 15740.0126429428. The cubic root of 247747998 is about 628.0632534635.

The spelling of 247747998 in words is "two hundred forty-seven million, seven hundred forty-seven thousand, nine hundred ninety-eight".