1380657788 has 48 divisors (see below), whose sum is σ = 2656281600. Its totient is φ = 625079040.

The previous prime is 1380657749. The next prime is 1380657809. The reversal of 1380657788 is 8877560831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375503 + ... + 379161.

It is an arithmetic number, because the mean of its divisors is an integer number (55339200).

Almost surely, 2^1380657788 is an apocalyptic number.

It is an amenable number.

1380657788 is a deficient number, since it is larger than the sum of its proper divisors (1275623812).

1380657788 is a wasteful number, since it uses less digits than its factorization.

1380657788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3888 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 53.

The square root of 1380657788 is about 37157.2037161033. The cubic root of 1380657788 is about 1113.5131469602.

The spelling of 1380657788 in words is "one billion, three hundred eighty million, six hundred fifty-seven thousand, seven hundred eighty-eight".