1380891734 has 8 divisors (see below), whose sum is σ = 2073691368. Its totient is φ = 689661280.

The previous prime is 1380891731. The next prime is 1380891737. The reversal of 1380891734 is 4371980831.

It is an interprime number because it is at equal distance from previous prime (1380891731) and next prime (1380891737).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380891731) 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, 390092 + ... + 393615.

It is an arithmetic number, because the mean of its divisors is an integer number (259211421).

Almost surely, 2^1380891734 is an apocalyptic number.

1380891734 is a deficient number, since it is larger than the sum of its proper divisors (692799634).

1380891734 is an equidigital number, since it uses as much as digits as its factorization.

1380891734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784590.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1380891734 is about 37160.3516398863. The cubic root of 1380891734 is about 1113.5760366052.

The spelling of 1380891734 in words is "one billion, three hundred eighty million, eight hundred ninety-one thousand, seven hundred thirty-four".