1400406 has 16 divisors (see below), whose sum is σ = 3201024. Its totient is φ = 400104.

The previous prime is 1400387. The next prime is 1400411. The reversal of 1400406 is 6040041.

It is a super-2 number, since 2×1400406² = 3922273929672, 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, 16630 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (200064).

2^1400406 is an apocalyptic number.

1400406 is an abundant number, since it is smaller than the sum of its proper divisors (1800618).

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

1400406 is a wasteful number, since it uses less digits than its factorization.

1400406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33355.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1400406 is about 1183.3875104969. The cubic root of 1400406 is about 111.8797071561.

Adding to 1400406 its reverse (6040041), we get a palindrome (7440447).

The spelling of 1400406 in words is "one million, four hundred thousand, four hundred six".