1383157640 has 16 divisors (see below), whose sum is σ = 3112104780. Its totient is φ = 553263040.

The previous prime is 1383157637. The next prime is 1383157681. The reversal of 1383157640 is 467513831.

It can be written as a sum of positive squares in 2 ways, for example, as 1321031716 + 62125924 = 36346^2 + 7882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1383157594 and 1383157603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17289431 + ... + 17289510.

Almost surely, 2^1383157640 is an apocalyptic number.

1383157640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1383157640 is an abundant number, since it is smaller than the sum of its proper divisors (1728947140).

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

1383157640 is a wasteful number, since it uses less digits than its factorization.

1383157640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34578952 (or 34578948 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1383157640 is about 37190.8273637466. The cubic root of 1383157640 is about 1114.1847929324.

The spelling of 1383157640 in words is "one billion, three hundred eighty-three million, one hundred fifty-seven thousand, six hundred forty".