1380428245 has 24 divisors (see below), whose sum is σ = 1928596824. Its totient is φ = 945778176.

The previous prime is 1380428219. The next prime is 1380428249. The reversal of 1380428245 is 5428240831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 190937124 + 1189491121 = 13818^2 + 34489^2 .

It is not a de Polignac number, because 1380428245 - 2¹⁵ = 1380395477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380428249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 526177 + ... + 528793.

It is an arithmetic number, because the mean of its divisors is an integer number (80358201).

Almost surely, 2^1380428245 is an apocalyptic number.

It is an amenable number.

1380428245 is a deficient number, since it is larger than the sum of its proper divisors (548168579).

1380428245 is a wasteful number, since it uses less digits than its factorization.

1380428245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789 (or 4782 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 1380428245 is about 37154.1147788505. The cubic root of 1380428245 is about 1113.4514340296.

The spelling of 1380428245 in words is "one billion, three hundred eighty million, four hundred twenty-eight thousand, two hundred forty-five".