40090609 has 8 divisors (see below), whose sum is σ = 43267392. Its totient is φ = 36927120.

The previous prime is 40090601. The next prime is 40090621. The reversal of 40090609 is 90609004.

40090609 = T₂₄₇₇ + T₂₄₇₈ + ... + T₂₄₈₉.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40090609 - 2³ = 40090601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40090601) 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, 3474 + ... + 9604.

It is an arithmetic number, because the mean of its divisors is an integer number (5408424).

Almost surely, 2^40090609 is an apocalyptic number.

It is an amenable number.

40090609 is a deficient number, since it is larger than the sum of its proper divisors (3176783).

40090609 is a wasteful number, since it uses less digits than its factorization.

40090609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40090609 is about 6331.7145387328. The cubic root of 40090609 is about 342.2532266134.

The spelling of 40090609 in words is "forty million, ninety thousand, six hundred nine".