40010320 has 80 divisors (see below), whose sum is σ = 109243008. Its totient is φ = 13340160.

The previous prime is 40010309. The next prime is 40010353. The reversal of 40010320 is 2301004.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 40010297 and 40010306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19755 + ... + 21685.

Almost surely, 2^40010320 is an apocalyptic number.

40010320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40010320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54621504).

40010320 is an abundant number, since it is smaller than the sum of its proper divisors (69232688).

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

40010320 is a wasteful number, since it uses less digits than its factorization.

40010320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40010320 is about 6325.3711353564. The cubic root of 40010320 is about 342.0245983926.

Adding to 40010320 its reverse (2301004), we get a palindrome (42311324).

The spelling of 40010320 in words is "forty million, ten thousand, three hundred twenty".