1380400545 has 32 divisors (see below), whose sum is σ = 2318902272. Its totient is φ = 699855552.

The previous prime is 1380400543. The next prime is 1380400547. The reversal of 1380400545 is 5450040831.

It is an interprime number because it is at equal distance from previous prime (1380400543) and next prime (1380400547).

It is not a de Polignac number, because 1380400545 - 2¹ = 1380400543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380400543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43962 + ... + 68508.

It is an arithmetic number, because the mean of its divisors is an integer number (72465696).

Almost surely, 2^1380400545 is an apocalyptic number.

1380400545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1380400545 is a deficient number, since it is larger than the sum of its proper divisors (938501727).

1380400545 is a wasteful number, since it uses less digits than its factorization.

1380400545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24741.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1380400545 is about 37153.7420053485. The cubic root of 1380400545 is about 1113.4439863864.

The spelling of 1380400545 in words is "one billion, three hundred eighty million, four hundred thousand, five hundred forty-five".