40398237 has 32 divisors (see below), whose sum is σ = 68736000. Its totient is φ = 23191920.

The previous prime is 40398233. The next prime is 40398263. The reversal of 40398237 is 73289304.

It is not a de Polignac number, because 40398237 - 2² = 40398233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2064 + ... + 9222.

It is an arithmetic number, because the mean of its divisors is an integer number (2148000).

Almost surely, 2^40398237 is an apocalyptic number.

It is an amenable number.

40398237 is a deficient number, since it is larger than the sum of its proper divisors (28337763).

40398237 is a wasteful number, since it uses less digits than its factorization.

40398237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7198 (or 7192 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 40398237 is about 6355.9607456308. The cubic root of 40398237 is about 343.1264029923.

The spelling of 40398237 in words is "forty million, three hundred ninety-eight thousand, two hundred thirty-seven".