1396781742 has 8 divisors (see below), whose sum is σ = 2793563496. Its totient is φ = 465593912.

The previous prime is 1396781731. The next prime is 1396781747. The reversal of 1396781742 is 2471876931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1396781742 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1396781691 and 1396781700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396781747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116398473 + ... + 116398484.

It is an arithmetic number, because the mean of its divisors is an integer number (349195437).

Almost surely, 2^1396781742 is an apocalyptic number.

1396781742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1396781742 is a wasteful number, since it uses less digits than its factorization.

1396781742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232796962.

The product of its digits is 508032, while the sum is 48.

The square root of 1396781742 is about 37373.5433428515. The cubic root of 1396781742 is about 1117.8310868793.

The spelling of 1396781742 in words is "one billion, three hundred ninety-six million, seven hundred eighty-one thousand, seven hundred forty-two".