40389626 has 8 divisors (see below), whose sum is σ = 61314624. Its totient is φ = 19951420.

The previous prime is 40389581. The next prime is 40389691. The reversal of 40389626 is 62698304.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40389626.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121490 + ... + 121821.

It is an arithmetic number, because the mean of its divisors is an integer number (7664328).

Almost surely, 2^40389626 is an apocalyptic number.

40389626 is a deficient number, since it is larger than the sum of its proper divisors (20924998).

40389626 is a wasteful number, since it uses less digits than its factorization.

40389626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243396.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 40389626 is about 6355.2833139051. The cubic root of 40389626 is about 343.1020218011.

The spelling of 40389626 in words is "forty million, three hundred eighty-nine thousand, six hundred twenty-six".