40399305 has 8 divisors (see below), whose sum is σ = 64638912. Its totient is φ = 21546288.

The previous prime is 40399297. The next prime is 40399313. The reversal of 40399305 is 50399304.

It is an interprime number because it is at equal distance from previous prime (40399297) and next prime (40399313).

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

It is not a de Polignac number, because 40399305 - 2³ = 40399297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346629 + ... + 1346658.

It is an arithmetic number, because the mean of its divisors is an integer number (8079864).

Almost surely, 2^40399305 is an apocalyptic number.

It is an amenable number.

40399305 is a deficient number, since it is larger than the sum of its proper divisors (24239607).

40399305 is a wasteful number, since it uses less digits than its factorization.

40399305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693295.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 40399305 is about 6356.0447606983. The cubic root of 40399305 is about 343.1294266867.

Subtracting 40399305 from its reverse (50399304), we obtain a palindrome (9999999).

It can be divided in two parts, 40399 and 305, that added together give a palindrome (40704).

The spelling of 40399305 in words is "forty million, three hundred ninety-nine thousand, three hundred five".