1390623 has 16 divisors (see below), whose sum is σ = 2018016. Its totient is φ = 846720.

The previous prime is 1390621. The next prime is 1390633. The reversal of 1390623 is 3260931.

It is not a de Polignac number, because 1390623 - 2¹ = 1390621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1390593 and 1390602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6961 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (126126).

2^1390623 is an apocalyptic number.

1390623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1390623 is a deficient number, since it is larger than the sum of its proper divisors (627393).

1390623 is a wasteful number, since it uses less digits than its factorization.

1390623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 1390623 is about 1179.2467935085. The cubic root of 1390623 is about 111.6185738795.

The spelling of 1390623 in words is "one million, three hundred ninety thousand, six hundred twenty-three".