40231320 has 32 divisors (see below), whose sum is σ = 120694320. Its totient is φ = 10728320.

The previous prime is 40231319. The next prime is 40231339. The reversal of 40231320 is 2313204.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40231320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167511 + ... + 167750.

Almost surely, 2^40231320 is an apocalyptic number.

40231320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40231320 is an abundant number, since it is smaller than the sum of its proper divisors (80463000).

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

40231320 is a wasteful number, since it uses less digits than its factorization.

40231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335275 (or 335271 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40231320 is about 6342.8164091356. The cubic root of 40231320 is about 342.6531753097.

Adding to 40231320 its reverse (2313204), we get a palindrome (42544524).

The spelling of 40231320 in words is "forty million, two hundred thirty-one thousand, three hundred twenty".