1396748840 has 16 divisors (see below), whose sum is σ = 3142684980. Its totient is φ = 558699520.

The previous prime is 1396748827. The next prime is 1396748851. The reversal of 1396748840 is 488476931.

It can be written as a sum of positive squares in 2 ways, for example, as 1345569124 + 51179716 = 36682^2 + 7154^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17459321 + ... + 17459400.

Almost surely, 2^1396748840 is an apocalyptic number.

1396748840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1396748840 is an abundant number, since it is smaller than the sum of its proper divisors (1745936140).

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

1396748840 is a wasteful number, since it uses less digits than its factorization.

1396748840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34918732 (or 34918728 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 1396748840 is about 37373.1031625687. The cubic root of 1396748840 is about 1117.8223097583.

The spelling of 1396748840 in words is "one billion, three hundred ninety-six million, seven hundred forty-eight thousand, eight hundred forty".