1378960221 has 8 divisors (see below), whose sum is σ = 1840596480. Its totient is φ = 918315392.

The previous prime is 1378960159. The next prime is 1378960223. The reversal of 1378960221 is 1220698731.

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

It is a cyclic number.

It is not a de Polignac number, because 1378960221 - 2¹⁴ = 1378943837 is a prime.

It is a super-2 number, since 2×1378960221² = 3803062582200737682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378960221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378960223) 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, 244605 + ... + 250178.

It is an arithmetic number, because the mean of its divisors is an integer number (230074560).

Almost surely, 2^1378960221 is an apocalyptic number.

It is an amenable number.

1378960221 is a deficient number, since it is larger than the sum of its proper divisors (461636259).

1378960221 is an equidigital number, since it uses as much as digits as its factorization.

1378960221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495715.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1378960221 is about 37134.3536499560. The cubic root of 1378960221 is about 1113.0565920163.

The spelling of 1378960221 in words is "one billion, three hundred seventy-eight million, nine hundred sixty thousand, two hundred twenty-one".