40030320 has 160 divisors (see below), whose sum is σ = 138205440. Its totient is φ = 9502720.

The previous prime is 40030313. The next prime is 40030357. The reversal of 40030320 is 2303004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40030296 and 40030305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155632 + ... + 155888.

It is an arithmetic number, because the mean of its divisors is an integer number (863784).

Almost surely, 2^40030320 is an apocalyptic number.

40030320 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 40030320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69102720).

40030320 is an abundant number, since it is smaller than the sum of its proper divisors (98175120).

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

40030320 is a wasteful number, since it uses less digits than its factorization.

40030320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 40030320 is about 6326.9518727425. The cubic root of 40030320 is about 342.0815782959.

Adding to 40030320 its reverse (2303004), we get a palindrome (42333324).

The spelling of 40030320 in words is "forty million, thirty thousand, three hundred twenty".