1376863540 has 24 divisors (see below), whose sum is σ = 3113830440. Its totient is φ = 508380288.

The previous prime is 1376863489. The next prime is 1376863547. The reversal of 1376863540 is 453686731.

It can be written as a sum of positive squares in 4 ways, for example, as 229280164 + 1147583376 = 15142^2 + 33876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376863547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2647555 + ... + 2648074.

It is an arithmetic number, because the mean of its divisors is an integer number (129742935).

Almost surely, 2^1376863540 is an apocalyptic number.

1376863540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1376863540 is an abundant number, since it is smaller than the sum of its proper divisors (1736966900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1376863540 is a wasteful number, since it uses less digits than its factorization.

1376863540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295651 (or 5295649 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 1376863540 is about 37106.1118954816. Note that the first 3 decimals coincide. The cubic root of 1376863540 is about 1112.4921792153.

The spelling of 1376863540 in words is "one billion, three hundred seventy-six million, eight hundred sixty-three thousand, five hundred forty".