40389999 has 8 divisors (see below), whose sum is σ = 57995952. Its totient is φ = 24855360.

The previous prime is 40389997. The next prime is 40390003. The reversal of 40389999 is 99998304.

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

It is not a de Polignac number, because 40389999 - 2¹ = 40389997 is a prime.

40389999 is a modest number, since divided by 9999 gives 4038 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389997) 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, 517782 + ... + 517859.

It is an arithmetic number, because the mean of its divisors is an integer number (7249494).

Almost surely, 2^40389999 is an apocalyptic number.

40389999 is a deficient number, since it is larger than the sum of its proper divisors (17605953).

40389999 is a wasteful number, since it uses less digits than its factorization.

40389999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035657.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 40389999 is about 6355.3126594999. The cubic root of 40389999 is about 343.1030779854.

The spelling of 40389999 in words is "forty million, three hundred eighty-nine thousand, nine hundred ninety-nine".