1392390 has 56 divisors (see below), whose sum is σ = 3777408. Its totient is φ = 369360.

The previous prime is 1392379. The next prime is 1392407. The reversal of 1392390 is 932931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 7195 + ... + 7385.

2^1392390 is an apocalyptic number.

1392390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888704).

1392390 is an abundant number, since it is smaller than the sum of its proper divisors (2385018).

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

1392390 is an equidigital number, since it uses as much as digits as its factorization.

1392390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 1392390 is about 1179.9957627043. The cubic root of 1392390 is about 111.6658300474.

The spelling of 1392390 in words is "one million, three hundred ninety-two thousand, three hundred ninety".