1390736 has 20 divisors (see below), whose sum is σ = 2853612. Its totient is φ = 654336.

The previous prime is 1390733. The next prime is 1390757. The reversal of 1390736 is 6370931.

It can be written as a sum of positive squares in 2 ways, for example, as 430336 + 960400 = 656^2 + 980^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1390699 and 1390708.

It is not an unprimeable number, because it can be changed into a prime (1390733) 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, 2285 + ... + 2828.

2^1390736 is an apocalyptic number.

1390736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1390736 is an abundant number, since it is smaller than the sum of its proper divisors (1462876).

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

1390736 is a wasteful number, since it uses less digits than its factorization.

1390736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138 (or 5132 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 1390736 is about 1179.2947044738. The cubic root of 1390736 is about 111.6215971186.

It can be divided in two parts, 139073 and 6, that multiplied together give a palindrome (834438).

The spelling of 1390736 in words is "one million, three hundred ninety thousand, seven hundred thirty-six".