1238733645 has 32 divisors (see below), whose sum is σ = 2143231488. Its totient is φ = 608560128.

The previous prime is 1238733623. The next prime is 1238733673. The reversal of 1238733645 is 5463378321.

It is not a de Polignac number, because 1238733645 - 2¹¹ = 1238731597 is a prime.

It is a super-3 number, since 3×1238733645³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1238733597 and 1238733606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39694 + ... + 63663.

It is an arithmetic number, because the mean of its divisors is an integer number (66975984).

Almost surely, 2^1238733645 is an apocalyptic number.

1238733645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1238733645 is a deficient number, since it is larger than the sum of its proper divisors (904497843).

1238733645 is a wasteful number, since it uses less digits than its factorization.

1238733645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103429.

The product of its digits is 362880, while the sum is 42.

The square root of 1238733645 is about 35195.6480974566. The cubic root of 1238733645 is about 1073.9712227308.

The spelling of 1238733645 in words is "one billion, two hundred thirty-eight million, seven hundred thirty-three thousand, six hundred forty-five".