1393992 has 48 divisors (see below), whose sum is σ = 3978000. Its totient is φ = 439776.

The previous prime is 1393991. The next prime is 1393999. The reversal of 1393992 is 2993931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1393991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 859 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (82875).

2^1393992 is an apocalyptic number.

1393992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1393992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1989000).

1393992 is an abundant number, since it is smaller than the sum of its proper divisors (2584008).

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

1393992 is a wasteful number, since it uses less digits than its factorization.

1393992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050 (or 1043 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1393992 is about 1180.6743835622. The cubic root of 1393992 is about 111.7086389581.

The spelling of 1393992 in words is "one million, three hundred ninety-three thousand, nine hundred ninety-two".