1378233645 has 8 divisors (see below), whose sum is σ = 2205173856. Its totient is φ = 735057936.

The previous prime is 1378233641. The next prime is 1378233667. The reversal of 1378233645 is 5463328731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1378233645 - 2² = 1378233641 is a prime.

It is a super-3 number, since 3×1378233645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378233597 and 1378233606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378233641) 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, 45941107 + ... + 45941136.

It is an arithmetic number, because the mean of its divisors is an integer number (275646732).

Almost surely, 2^1378233645 is an apocalyptic number.

1378233645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378233645 is a deficient number, since it is larger than the sum of its proper divisors (826940211).

1378233645 is an equidigital number, since it uses as much as digits as its factorization.

1378233645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91882251.

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

The square root of 1378233645 is about 37124.5692904308. The cubic root of 1378233645 is about 1112.8610673317.

The spelling of 1378233645 in words is "one billion, three hundred seventy-eight million, two hundred thirty-three thousand, six hundred forty-five".