40138419 has 4 divisors (see below), whose sum is σ = 53517896. Its totient is φ = 26758944.

The previous prime is 40138409. The next prime is 40138421. The reversal of 40138419 is 91483104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40138419 - 2⁵ = 40138387 is a prime.

It is a super-2 number, since 2×40138419² = 3222185359639122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40138409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6689734 + ... + 6689739.

It is an arithmetic number, because the mean of its divisors is an integer number (13379474).

Almost surely, 2^40138419 is an apocalyptic number.

40138419 is a deficient number, since it is larger than the sum of its proper divisors (13379477).

40138419 is a wasteful number, since it uses less digits than its factorization.

40138419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13379476.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 40138419 is about 6335.4888524880. The cubic root of 40138419 is about 342.3892237698.

The spelling of 40138419 in words is "forty million, one hundred thirty-eight thousand, four hundred nineteen".