1378440508 has 24 divisors (see below), whose sum is σ = 2575698048. Its totient is φ = 643920816.

The previous prime is 1378440493. The next prime is 1378440509. The reversal of 1378440508 is 8050448731.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378440509) 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, 170266 + ... + 178177.

It is an arithmetic number, because the mean of its divisors is an integer number (107320752).

Almost surely, 2^1378440508 is an apocalyptic number.

It is an amenable number.

1378440508 is a deficient number, since it is larger than the sum of its proper divisors (1197257540).

1378440508 is a wasteful number, since it uses less digits than its factorization.

1378440508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348513 (or 348511 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1378440508 is about 37127.3552518894. The cubic root of 1378440508 is about 1112.9167420385.

The spelling of 1378440508 in words is "one billion, three hundred seventy-eight million, four hundred forty thousand, five hundred eight".