1238428924 has 24 divisors (see below), whose sum is σ = 2245552848. Its totient is φ = 597139200.

The previous prime is 1238428921. The next prime is 1238428927. The reversal of 1238428924 is 4298248321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1238428921) and next prime (1238428927).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238428921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20302 + ... + 53749.

It is an arithmetic number, because the mean of its divisors is an integer number (93564702).

Almost surely, 2^1238428924 is an apocalyptic number.

It is an amenable number.

1238428924 is a deficient number, since it is larger than the sum of its proper divisors (1007123924).

1238428924 is a wasteful number, since it uses less digits than its factorization.

1238428924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74205 (or 74203 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 1238428924 is about 35191.3188726993. The cubic root of 1238428924 is about 1073.8831520292.

The spelling of 1238428924 in words is "one billion, two hundred thirty-eight million, four hundred twenty-eight thousand, nine hundred twenty-four".