1377801438 has 32 divisors (see below), whose sum is σ = 2969858976. Its totient is φ = 423612288.

The previous prime is 1377801437. The next prime is 1377801487. The reversal of 1377801438 is 8341087731.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377801438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377801437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107256 + ... + 119412.

It is an arithmetic number, because the mean of its divisors is an integer number (92808093).

Almost surely, 2^1377801438 is an apocalyptic number.

1377801438 is an abundant number, since it is smaller than the sum of its proper divisors (1592057538).

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

1377801438 is a wasteful number, since it uses less digits than its factorization.

1377801438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13628.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1377801438 is about 37118.7477967671. The cubic root of 1377801438 is about 1112.7447259958.

The spelling of 1377801438 in words is "one billion, three hundred seventy-seven million, eight hundred one thousand, four hundred thirty-eight".