1238645900 has 36 divisors (see below), whose sum is σ = 2692645368. Its totient is φ = 494576640.

The previous prime is 1238645869. The next prime is 1238645911. The reversal of 1238645900 is 95468321.

It is a happy 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, 46967 + ... + 68433.

Almost surely, 2^1238645900 is an apocalyptic number.

1238645900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238645900 is an abundant number, since it is smaller than the sum of its proper divisors (1453999468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1238645900 is a wasteful number, since it uses less digits than its factorization.

1238645900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22058 (or 22051 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1238645900 is about 35194.4015434273. The cubic root of 1238645900 is about 1073.9458640831.

The spelling of 1238645900 in words is "one billion, two hundred thirty-eight million, six hundred forty-five thousand, nine hundred".