1377657768 has 32 divisors (see below), whose sum is σ = 3456869760. Its totient is φ = 457522560.

The previous prime is 1377657767. The next prime is 1377657793. The reversal of 1377657768 is 8677567731.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1377657761) 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, 99405 + ... + 112412.

It is an arithmetic number, because the mean of its divisors is an integer number (108027180).

Almost surely, 2^1377657768 is an apocalyptic number.

It is an amenable number.

1377657768 is an abundant number, since it is smaller than the sum of its proper divisors (2079211992).

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

1377657768 is a wasteful number, since it uses less digits than its factorization.

1377657768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212097 (or 212093 counting only the distinct ones).

The product of its digits is 10372320, while the sum is 57.

The square root of 1377657768 is about 37116.8124709006. The cubic root of 1377657768 is about 1112.7060475652.

The spelling of 1377657768 in words is "one billion, three hundred seventy-seven million, six hundred fifty-seven thousand, seven hundred sixty-eight".