247740506 has 32 divisors (see below), whose sum is σ = 422452800. Its totient is φ = 108017280.

The previous prime is 247740503. The next prime is 247740509. The reversal of 247740506 is 605047742.

It is an interprime number because it is at equal distance from previous prime (247740503) and next prime (247740509).

It is a super-2 number, since 2×247740506² = 122750716626272072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247740503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325166 + ... + 325926.

It is an arithmetic number, because the mean of its divisors is an integer number (13201650).

Almost surely, 2^247740506 is an apocalyptic number.

247740506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

247740506 is a deficient number, since it is larger than the sum of its proper divisors (174712294).

247740506 is a wasteful number, since it uses less digits than its factorization.

247740506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 247740506 is about 15739.7746489586. The cubic root of 247740506 is about 628.0569224371.

The spelling of 247740506 in words is "two hundred forty-seven million, seven hundred forty thousand, five hundred six".