1376663408 has 40 divisors (see below), whose sum is σ = 2769480480. Its totient is φ = 662135040.

The previous prime is 1376663389. The next prime is 1376663423. The reversal of 1376663408 is 8043666731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123173 + ... + 133883.

It is an arithmetic number, because the mean of its divisors is an integer number (69237012).

Almost surely, 2^1376663408 is an apocalyptic number.

1376663408 is the 21422-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1376663408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384740240).

1376663408 is an abundant number, since it is smaller than the sum of its proper divisors (1392817072).

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

1376663408 is a wasteful number, since it uses less digits than its factorization.

1376663408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025 (or 11019 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 1376663408 is about 37103.4150449794. The cubic root of 1376663408 is about 1112.4382750419.

The spelling of 1376663408 in words is "one billion, three hundred seventy-six million, six hundred sixty-three thousand, four hundred eight".