1403864 has 64 divisors (see below), whose sum is σ = 3421440. Its totient is φ = 524160.

The previous prime is 1403849. The next prime is 1403869. The reversal of 1403864 is 4683041.

It is a hoax number, since the sum of its digits (26) 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 (1403869) 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, 26462 + ... + 26514.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2^1403864 is an apocalyptic number.

1403864 is a gapful number since it is divisible by the number (14) 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 1403864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710720).

1403864 is an abundant number, since it is smaller than the sum of its proper divisors (2017576).

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

1403864 is a wasteful number, since it uses less digits than its factorization.

1403864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1403864 is about 1184.8476695339. The cubic root of 1403864 is about 111.9717190499.

It can be divided in two parts, 140 and 3864, that added together give a palindrome (4004).

The spelling of 1403864 in words is "one million, four hundred three thousand, eight hundred sixty-four".