1376378406 has 80 divisors (see below), whose sum is σ = 3335580864. Its totient is φ = 421687296.

The previous prime is 1376378401. The next prime is 1376378413. The reversal of 1376378406 is 6048736731.

1376378406 is a `hidden beast` number, since 1 + 3 + 7 + 637 + 8 + 4 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376378401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 539971 + ... + 542513.

Almost surely, 2^1376378406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1376378406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667790432).

1376378406 is an abundant number, since it is smaller than the sum of its proper divisors (1959202458).

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

1376378406 is a wasteful number, since it uses less digits than its factorization.

1376378406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 1376378406 is about 37099.5742024083. The cubic root of 1376378406 is about 1112.3615027017.

The spelling of 1376378406 in words is "one billion, three hundred seventy-six million, three hundred seventy-eight thousand, four hundred six".