1377889632 has 72 divisors (see below), whose sum is σ = 4478147856. Its totient is φ = 393682176.

The previous prime is 1377889631. The next prime is 1377889679. The reversal of 1377889632 is 2369887731.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377889631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339723 + ... + 343754.

It is an arithmetic number, because the mean of its divisors is an integer number (62196498).

Almost surely, 2^1377889632 is an apocalyptic number.

1377889632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1377889632 is an abundant number, since it is smaller than the sum of its proper divisors (3100258224).

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

1377889632 is a wasteful number, since it uses less digits than its factorization.

1377889632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683500 (or 683489 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1377889632 is about 37119.9357758065. The cubic root of 1377889632 is about 1112.7684680029.

The spelling of 1377889632 in words is "one billion, three hundred seventy-seven million, eight hundred eighty-nine thousand, six hundred thirty-two".