40317390 has 48 divisors (see below), whose sum is σ = 109388448. Its totient is φ = 10283328.

The previous prime is 40317379. The next prime is 40317397. The reversal of 40317390 is 9371304.

40317390 is a `hidden beast` number, since 403 + 173 + 90 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40317397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7669 + ... + 11808.

It is an arithmetic number, because the mean of its divisors is an integer number (2278926).

Almost surely, 2^40317390 is an apocalyptic number.

40317390 is an abundant number, since it is smaller than the sum of its proper divisors (69071058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40317390 is a wasteful number, since it uses less digits than its factorization.

40317390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19513 (or 19510 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 40317390 is about 6349.5976250468. The cubic root of 40317390 is about 342.8973561463.

Adding to 40317390 its reverse (9371304), we get a palindrome (49688694).

The spelling of 40317390 in words is "forty million, three hundred seventeen thousand, three hundred ninety".