247232478 has 16 divisors (see below), whose sum is σ = 497427840. Its totient is φ = 81917016.

The previous prime is 247232467. The next prime is 247232519. The reversal of 247232478 is 874232742.

247232478 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 2×247232478² = 122247796356040968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122368 + ... + 124371.

It is an arithmetic number, because the mean of its divisors is an integer number (31089240).

Almost surely, 2^247232478 is an apocalyptic number.

247232478 is an abundant number, since it is smaller than the sum of its proper divisors (250195362).

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

247232478 is a wasteful number, since it uses less digits than its factorization.

247232478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246911.

The product of its digits is 150528, while the sum is 39.

The square root of 247232478 is about 15723.6280164598. The cubic root of 247232478 is about 627.6273212436.

The spelling of 247232478 in words is "two hundred forty-seven million, two hundred thirty-two thousand, four hundred seventy-eight".