1390726 has 8 divisors (see below), whose sum is σ = 2091960. Its totient is φ = 693408.

The previous prime is 1390709. The next prime is 1390729. The reversal of 1390726 is 6270931.

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

It is a junction number, because it is equal to n+sod(n) for n = 1390694 and 1390703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390729) 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, 190 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (261495).

2^1390726 is an apocalyptic number.

1390726 is a deficient number, since it is larger than the sum of its proper divisors (701234).

1390726 is a wasteful number, since it uses less digits than its factorization.

1390726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1390726 is about 1179.2904646439. The cubic root of 1390726 is about 111.6213295819.

It can be divided in two parts, 1390 and 726, that added together give a square (2116 = 46²).

The spelling of 1390726 in words is "one million, three hundred ninety thousand, seven hundred twenty-six".