40491339 has 16 divisors (see below), whose sum is σ = 64384512. Its totient is φ = 22131648.

The previous prime is 40491317. The next prime is 40491343. The reversal of 40491339 is 93319404.

It is not a de Polignac number, because 40491339 - 2¹³ = 40483147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40491349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41434 + ... + 42399.

It is an arithmetic number, because the mean of its divisors is an integer number (4024032).

Almost surely, 2^40491339 is an apocalyptic number.

40491339 is a deficient number, since it is larger than the sum of its proper divisors (23893173).

40491339 is a wasteful number, since it uses less digits than its factorization.

40491339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83866.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 40491339 is about 6363.2805218692. The cubic root of 40491339 is about 343.3897910947.

The spelling of 40491339 in words is "forty million, four hundred ninety-one thousand, three hundred thirty-nine".