1387226040 has 64 divisors (see below), whose sum is σ = 4164480000. Its totient is φ = 369677952.

The previous prime is 1387225999. The next prime is 1387226051. The reversal of 1387226040 is 406227831.

It is a junction number, because it is equal to n+sod(n) for n = 1387225992 and 1387226010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236989 + ... + 242771.

It is an arithmetic number, because the mean of its divisors is an integer number (65070000).

Almost surely, 2^1387226040 is an apocalyptic number.

1387226040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1387226040 is an abundant number, since it is smaller than the sum of its proper divisors (2777253960).

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

1387226040 is a wasteful number, since it uses less digits than its factorization.

1387226040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7796 (or 7792 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 1387226040 is about 37245.4834845784. The cubic root of 1387226040 is about 1115.2761393186.

The spelling of 1387226040 in words is "one billion, three hundred eighty-seven million, two hundred twenty-six thousand, forty".