2031406 has 32 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 864864.

The previous prime is 2031397. The next prime is 2031409. The reversal of 2031406 is 6041302.

It is a super-2 number, since 2×2031406² = 8253220673672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2031406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031409) 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, 25675 + ... + 25753.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^2031406 is an apocalyptic number.

2031406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2031406 is a deficient number, since it is larger than the sum of its proper divisors (1516754).

2031406 is a wasteful number, since it uses less digits than its factorization.

2031406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2031406 is about 1425.2740087436. The cubic root of 2031406 is about 126.6481675046.

Adding to 2031406 its reverse (6041302), we get a palindrome (8072708).

The spelling of 2031406 in words is "two million, thirty-one thousand, four hundred six".