40426 has 16 divisors (see below), whose sum is σ = 68040. Its totient is φ = 17920.

The previous prime is 40423. The next prime is 40427. The reversal of 40426 is 62404.

It can be written as a sum of positive squares in 4 ways, for example, as 30625 + 9801 = 175^2 + 99^2 .

It is a super-2 number, since 2×40426² = 3268522952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40423) 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, 966 + ... + 1006.

2⁴⁰⁴²⁶ is an apocalyptic number.

40426 is a deficient number, since it is larger than the sum of its proper divisors (27614).

40426 is a wasteful number, since it uses less digits than its factorization.

40426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40426 is about 201.0621794371. The cubic root of 40426 is about 34.3204987584.

The spelling of 40426 in words is "forty thousand, four hundred twenty-six".