1396820 has 24 divisors (see below), whose sum is σ = 2956128. Its totient is φ = 554400.

The previous prime is 1396819. The next prime is 1396841. The reversal of 1396820 is 286931.

It is a super-2 number, since 2×1396820² = 3902212224800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4055 + ... + 4385.

It is an arithmetic number, because the mean of its divisors is an integer number (123172).

2^1396820 is an apocalyptic number.

1396820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1396820 is an abundant number, since it is smaller than the sum of its proper divisors (1559308).

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

1396820 is a wasteful number, since it uses less digits than its factorization.

1396820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1396820 is about 1181.8713974033. The cubic root of 1396820 is about 111.7841292623.

The spelling of 1396820 in words is "one million, three hundred ninety-six thousand, eight hundred twenty".