247808742 has 16 divisors (see below), whose sum is σ = 507144000. Its totient is φ = 80681832.

The previous prime is 247808723. The next prime is 247808753.

247808742 is nontrivially palindromic in base 10.

247808742 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 2×247808742² = 122818345223245128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247808694 and 247808703.

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, 479992 + ... + 480507.

It is an arithmetic number, because the mean of its divisors is an integer number (31696500).

Almost surely, 2^247808742 is an apocalyptic number.

247808742 is an abundant number, since it is smaller than the sum of its proper divisors (259335258).

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

247808742 is a wasteful number, since it uses less digits than its factorization.

247808742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960547.

The product of its (nonzero) digits is 200704, while the sum is 42.

The square root of 247808742 is about 15741.9421292292. The cubic root of 247808742 is about 628.1145797534.

The spelling of 247808742 in words is "two hundred forty-seven million, eight hundred eight thousand, seven hundred forty-two".