40307520 has 168 divisors, whose sum is σ = 141073632. Its totient is φ = 9743360.

The previous prime is 40307479. The next prime is 40307549. The reversal of 40307520 is 2570304.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115987 + ... + 116333.

It is an arithmetic number, because the mean of its divisors is an integer number (839724).

Almost surely, 2^40307520 is an apocalyptic number.

40307520 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 40307520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70536816).

40307520 is an abundant number, since it is smaller than the sum of its proper divisors (100766112).

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

40307520 is a wasteful number, since it uses less digits than its factorization.

40307520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 40307520 is about 6348.8203628706. The cubic root of 40307520 is about 342.8693725796.

Adding to 40307520 its reverse (2570304), we get a palindrome (42877824).

The spelling of 40307520 in words is "forty million, three hundred seven thousand, five hundred twenty".