1394308240 has 40 divisors (see below), whose sum is σ = 3491135928. Its totient is φ = 514821120.

The previous prime is 1394308189. The next prime is 1394308241. The reversal of 1394308240 is 428034931.

It can be written as a sum of positive squares in 4 ways, for example, as 5702544 + 1388605696 = 2388^2 + 37264^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1394308196 and 1394308205.

It is not an unprimeable number, because it can be changed into a prime (1394308241) 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, 669301 + ... + 671380.

Almost surely, 2^1394308240 is an apocalyptic number.

1394308240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1394308240 is an abundant number, since it is smaller than the sum of its proper divisors (2096827688).

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

1394308240 is a wasteful number, since it uses less digits than its factorization.

1394308240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340707 (or 1340701 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1394308240 is about 37340.4370622520. The cubic root of 1394308240 is about 1117.1708569930.

The spelling of 1394308240 in words is "one billion, three hundred ninety-four million, three hundred eight thousand, two hundred forty".