1383242640 has 80 divisors (see below), whose sum is σ = 4617912768. Its totient is φ = 340489728.

The previous prime is 1383242629. The next prime is 1383242647. The reversal of 1383242640 is 462423831.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1383242640² = 3826720402228339200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1383242647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218554 + ... + 224793.

Almost surely, 2^1383242640 is an apocalyptic number.

1383242640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1383242640 is an abundant number, since it is smaller than the sum of its proper divisors (3234670128).

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

1383242640 is a wasteful number, since it uses less digits than its factorization.

1383242640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443376 (or 443370 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 1383242640 is about 37191.9701010850. The cubic root of 1383242640 is about 1114.2076160160.

The spelling of 1383242640 in words is "one billion, three hundred eighty-three million, two hundred forty-two thousand, six hundred forty".