40426403 has 2 divisors, whose sum is σ = 40426404. Its totient is φ = 40426402.

The previous prime is 40426349. The next prime is 40426409. The reversal of 40426403 is 30462404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40426403 - 2⁶ = 40426339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40426409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20213201 + 20213202.

It is an arithmetic number, because the mean of its divisors is an integer number (20213202).

Almost surely, 2^40426403 is an apocalyptic number.

40426403 is a deficient number, since it is larger than the sum of its proper divisors (1).

40426403 is an equidigital number, since it uses as much as digits as its factorization.

40426403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 40426403 is about 6358.1760749448. The cubic root of 40426403 is about 343.2061280314.

Adding to 40426403 its reverse (30462404), we get a palindrome (70888807).

The spelling of 40426403 in words is "forty million, four hundred twenty-six thousand, four hundred three".