1377985746 has 16 divisors (see below), whose sum is σ = 2830457664. Its totient is φ = 446914224.

The previous prime is 1377985727. The next prime is 1377985747. The reversal of 1377985746 is 6475897731.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1377985747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3103350 + ... + 3103793.

It is an arithmetic number, because the mean of its divisors is an integer number (176903604).

Almost surely, 2^1377985746 is an apocalyptic number.

1377985746 is an abundant number, since it is smaller than the sum of its proper divisors (1452471918).

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

1377985746 is a wasteful number, since it uses less digits than its factorization.

1377985746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207185.

The product of its digits is 8890560, while the sum is 57.

The square root of 1377985746 is about 37121.2303944791. The cubic root of 1377985746 is about 1112.7943409367.

It can be divided in two parts, 1377985 and 746, that added together give a palindrome (1378731).

The spelling of 1377985746 in words is "one billion, three hundred seventy-seven million, nine hundred eighty-five thousand, seven hundred forty-six".