1399236 has 48 divisors (see below), whose sum is σ = 3648960. Its totient is φ = 415872.

The previous prime is 1399231. The next prime is 1399261. The reversal of 1399236 is 6329931.

It is a super-2 number, since 2×1399236² = 3915722767392, which contains 22 as substring.

Its product of digits (8748) is a multiple of the sum of its prime factors (81).

It is a junction number, because it is equal to n+sod(n) for n = 1399197 and 1399206.

It is not an unprimeable number, because it can be changed into a prime (1399231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73635 + ... + 73653.

It is an arithmetic number, because the mean of its divisors is an integer number (76020).

2^1399236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824480).

1399236 is an abundant number, since it is smaller than the sum of its proper divisors (2249724).

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

1399236 is a wasteful number, since it uses less digits than its factorization.

1399236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 41 counting only the distinct ones).

The product of its digits is 8748, while the sum is 33.

The square root of 1399236 is about 1182.8930636368. The cubic root of 1399236 is about 111.8485410208.

It can be divided in two parts, 13992 and 36, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1399236 in words is "one million, three hundred ninety-nine thousand, two hundred thirty-six".