40339397 has 12 divisors (see below), whose sum is σ = 47065356. Its totient is φ = 34473600.

The previous prime is 40339393. The next prime is 40339441. The reversal of 40339397 is 79393304.

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 7150276 = 5761^2 + 2674^2 .

It is not a de Polignac number, because 40339397 - 2² = 40339393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40339397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40339393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18623 + ... + 20675.

It is an arithmetic number, because the mean of its divisors is an integer number (3922113).

Almost surely, 2^40339397 is an apocalyptic number.

It is an amenable number.

40339397 is a deficient number, since it is larger than the sum of its proper divisors (6725959).

40339397 is a wasteful number, since it uses less digits than its factorization.

40339397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468 (or 2461 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 40339397 is about 6351.3303330877. The cubic root of 40339397 is about 342.9597342709.

The spelling of 40339397 in words is "forty million, three hundred thirty-nine thousand, three hundred ninety-seven".