247638634 has 16 divisors (see below), whose sum is σ = 384687072. Its totient is φ = 119479248.

The previous prime is 247638607. The next prime is 247638649. The reversal of 247638634 is 436836742.

It is a happy number.

247638634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247638634² = 122649786098771912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 10209 + ... + 24484.

It is an arithmetic number, because the mean of its divisors is an integer number (24042942).

Almost surely, 2^247638634 is an apocalyptic number.

247638634 is a deficient number, since it is larger than the sum of its proper divisors (137048438).

247638634 is a wasteful number, since it uses less digits than its factorization.

247638634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34821.

The product of its digits is 580608, while the sum is 43.

The square root of 247638634 is about 15736.5381834761. The cubic root of 247638634 is about 627.9708240330.

The spelling of 247638634 in words is "two hundred forty-seven million, six hundred thirty-eight thousand, six hundred thirty-four".