40420433 has 2 divisors, whose sum is σ = 40420434. Its totient is φ = 40420432.

The previous prime is 40420411. The next prime is 40420451. The reversal of 40420433 is 33402404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26708224 + 13712209 = 5168^2 + 3703^2 .

It is a cyclic number.

It is not a de Polignac number, because 40420433 - 2²² = 36226129 is a prime.

It is a super-2 number, since 2×40420433² = 3267622807814978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40420483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210216 + 20210217.

It is an arithmetic number, because the mean of its divisors is an integer number (20210217).

Almost surely, 2^40420433 is an apocalyptic number.

It is an amenable number.

40420433 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420433 is an equidigital number, since it uses as much as digits as its factorization.

40420433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40420433 is about 6357.7065833522. The cubic root of 40420433 is about 343.1892327905.

Adding to 40420433 its reverse (33402404), we get a palindrome (73822837).

The spelling of 40420433 in words is "forty million, four hundred twenty thousand, four hundred thirty-three".