1406388 has 24 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 465856.

The previous prime is 1406387. The next prime is 1406389. The reversal of 1406388 is 8836041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1406387) and next prime (1406389).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406387) 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, 2545 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^1406388 is an apocalyptic number.

It is an amenable number.

1406388 is an abundant number, since it is smaller than the sum of its proper divisors (1895820).

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

1406388 is a wasteful number, since it uses less digits than its factorization.

1406388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1406388 is about 1185.9123070447. The cubic root of 1406388 is about 112.0387833373.

The spelling of 1406388 in words is "one million, four hundred six thousand, three hundred eighty-eight".