1399847940 has 48 divisors (see below), whose sum is σ = 4355084160. Its totient is φ = 373292640.

The previous prime is 1399847921. The next prime is 1399847957. The reversal of 1399847940 is 497489931.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1295616 + ... + 1296695.

It is an arithmetic number, because the mean of its divisors is an integer number (90730920).

Almost surely, 2^1399847940 is an apocalyptic number.

1399847940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399847940 is an abundant number, since it is smaller than the sum of its proper divisors (2955236220).

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

1399847940 is a wasteful number, since it uses less digits than its factorization.

1399847940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592329 (or 2592321 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1399847940 is about 37414.5418253384. The cubic root of 1399847940 is about 1118.6484387482.

The spelling of 1399847940 in words is "one billion, three hundred ninety-nine million, eight hundred forty-seven thousand, nine hundred forty".