247929742 has 32 divisors (see below), whose sum is σ = 397742400. Its totient is φ = 115653120.

The previous prime is 247929739. The next prime is 247929761.

247929742 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×247929742² = 122938313936373128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 247929692 and 247929701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417798 + ... + 418390.

It is an arithmetic number, because the mean of its divisors is an integer number (12429450).

Almost surely, 2^247929742 is an apocalyptic number.

247929742 is a deficient number, since it is larger than the sum of its proper divisors (149812658).

247929742 is a wasteful number, since it uses less digits than its factorization.

247929742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its digits is 508032, while the sum is 46.

The square root of 247929742 is about 15745.7848962826. The cubic root of 247929742 is about 628.2167950032.

The spelling of 247929742 in words is "two hundred forty-seven million, nine hundred twenty-nine thousand, seven hundred forty-two".