40490819 has 2 divisors, whose sum is σ = 40490820. Its totient is φ = 40490818.

The previous prime is 40490809. The next prime is 40490831. The reversal of 40490819 is 91809404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40490819 - 2²⁴ = 23713603 is a prime.

It is a super-2 number, since 2×40490819² = 3279012846581522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40490809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20245409 + 20245410.

It is an arithmetic number, because the mean of its divisors is an integer number (20245410).

Almost surely, 2^40490819 is an apocalyptic number.

40490819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40490819 is an equidigital number, since it uses as much as digits as its factorization.

40490819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40490819 is about 6363.2396623104. The cubic root of 40490819 is about 343.3883211223.

The spelling of 40490819 in words is "forty million, four hundred ninety thousand, eight hundred nineteen".