1238408684 has 24 divisors (see below), whose sum is σ = 2178986880. Its totient is φ = 615851136.

The previous prime is 1238408681. The next prime is 1238408713. The reversal of 1238408684 is 4868048321.

It is a super-2 number, since 2×1238408684² = 3067312137213223712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1238408681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768872 + ... + 770480.

It is an arithmetic number, because the mean of its divisors is an integer number (90791120).

Almost surely, 2^1238408684 is an apocalyptic number.

It is an amenable number.

1238408684 is a deficient number, since it is larger than the sum of its proper divisors (940578196).

1238408684 is a wasteful number, since it uses less digits than its factorization.

1238408684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2535 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 1238408684 is about 35191.0313006027. The cubic root of 1238408684 is about 1073.8773017370.

The spelling of 1238408684 in words is "one billion, two hundred thirty-eight million, four hundred eight thousand, six hundred eighty-four".