40390437 has 8 divisors (see below), whose sum is σ = 54999936. Its totient is φ = 26353952.

The previous prime is 40390423. The next prime is 40390451. The reversal of 40390437 is 73409304.

It is an interprime number because it is at equal distance from previous prime (40390423) and next prime (40390451).

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

It is a cyclic number.

It is not a de Polignac number, because 40390437 - 2⁷ = 40390309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40390037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143088 + ... + 143369.

It is an arithmetic number, because the mean of its divisors is an integer number (6874992).

Almost surely, 2^40390437 is an apocalyptic number.

40390437 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40390437 is a deficient number, since it is larger than the sum of its proper divisors (14609499).

40390437 is a wasteful number, since it uses less digits than its factorization.

40390437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286507.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 40390437 is about 6355.3471187654. The cubic root of 40390437 is about 343.1043182149.

The spelling of 40390437 in words is "forty million, three hundred ninety thousand, four hundred thirty-seven".