1377905802 has 128 divisors (see below), whose sum is σ = 3590092800. Its totient is φ = 342372096.

The previous prime is 1377905801. The next prime is 1377905831. The reversal of 1377905802 is 2085097731.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1377905801) 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 63 ways as a sum of consecutive naturals, for example, 3288349 + ... + 3288767.

It is an arithmetic number, because the mean of its divisors is an integer number (28047600).

Almost surely, 2^1377905802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377905802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1795046400).

1377905802 is an abundant number, since it is smaller than the sum of its proper divisors (2212186998).

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

1377905802 is a wasteful number, since it uses less digits than its factorization.

1377905802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 1377905802 is about 37120.1535826564. The cubic root of 1377905802 is about 1112.7728208904.

The spelling of 1377905802 in words is "one billion, three hundred seventy-seven million, nine hundred five thousand, eight hundred two".