1396240 has 40 divisors (see below), whose sum is σ = 3356928. Its totient is φ = 539520.

The previous prime is 1396237. The next prime is 1396247. The reversal of 1396240 is 426931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1396240² = 3898972275200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2199 + ... + 2761.

2^1396240 is an apocalyptic number.

1396240 is a gapful number since it is divisible by the number (10) 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 1396240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678464).

1396240 is an abundant number, since it is smaller than the sum of its proper divisors (1960688).

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

1396240 is a wasteful number, since it uses less digits than its factorization.

1396240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1396240 is about 1181.6259983599. The cubic root of 1396240 is about 111.7686551209.

The spelling of 1396240 in words is "one million, three hundred ninety-six thousand, two hundred forty".