1377443538 has 12 divisors (see below), whose sum is σ = 2984461038. Its totient is φ = 459147840.

The previous prime is 1377443521. The next prime is 1377443549. The reversal of 1377443538 is 8353447731.

1377443538 is a `hidden beast` number, since 1 + 3 + 7 + 74 + 43 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1376929449 + 514089 = 37107^2 + 717^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1377443493 and 1377443502.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38262303 + ... + 38262338.

Almost surely, 2^1377443538 is an apocalyptic number.

1377443538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1377443538 is an abundant number, since it is smaller than the sum of its proper divisors (1607017500).

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

1377443538 is a wasteful number, since it uses less digits than its factorization.

1377443538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76524649 (or 76524646 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 1377443538 is about 37113.9264697229. The cubic root of 1377443538 is about 1112.6483681765.

The spelling of 1377443538 in words is "one billion, three hundred seventy-seven million, four hundred forty-three thousand, five hundred thirty-eight".