1399109240 has 32 divisors (see below), whose sum is σ = 3191125680. Its totient is φ = 551976192.

The previous prime is 1399109227. The next prime is 1399109249. The reversal of 1399109240 is 429019931.

It is a junction number, because it is equal to n+sod(n) for n = 1399109194 and 1399109203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399109249) 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, 236654 + ... + 242493.

Almost surely, 2^1399109240 is an apocalyptic number.

1399109240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399109240 is an abundant number, since it is smaller than the sum of its proper divisors (1792016440).

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

1399109240 is a wasteful number, since it uses less digits than its factorization.

1399109240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479231 (or 479227 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1399109240 is about 37404.6686925576. The cubic root of 1399109240 is about 1118.4516338012.

The spelling of 1399109240 in words is "one billion, three hundred ninety-nine million, one hundred nine thousand, two hundred forty".