40087439 has 16 divisors (see below), whose sum is σ = 47419200. Its totient is φ = 33868800.

The previous prime is 40087409. The next prime is 40087471. The reversal of 40087439 is 93478004.

It is not a de Polignac number, because 40087439 - 2¹² = 40083343 is a prime.

It is a super-3 number, since 3×40087439³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40087399 and 40087408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40087409) 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, 24239 + ... + 25839.

It is an arithmetic number, because the mean of its divisors is an integer number (2963700).

Almost surely, 2^40087439 is an apocalyptic number.

40087439 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40087439 is a deficient number, since it is larger than the sum of its proper divisors (7331761).

40087439 is an equidigital number, since it uses as much as digits as its factorization.

40087439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40087439 is about 6331.4642066429. The cubic root of 40087439 is about 342.2442056203.

The spelling of 40087439 in words is "forty million, eighty-seven thousand, four hundred thirty-nine".