247626742 has 24 divisors (see below), whose sum is σ = 409163328. Its totient is φ = 112313520.

The previous prime is 247626739. The next prime is 247626761.

247626742 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×247626742² = 122638006707069128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247626695 and 247626704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157243 + ... + 158809.

It is an arithmetic number, because the mean of its divisors is an integer number (17048472).

Almost surely, 2^247626742 is an apocalyptic number.

247626742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

247626742 is a deficient number, since it is larger than the sum of its proper divisors (161536586).

247626742 is a wasteful number, since it uses less digits than its factorization.

247626742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244 (or 2233 counting only the distinct ones).

The product of its digits is 225792, while the sum is 40.

The square root of 247626742 is about 15736.1603321776. The cubic root of 247626742 is about 627.9607718204.

The spelling of 247626742 in words is "two hundred forty-seven million, six hundred twenty-six thousand, seven hundred forty-two".