40233520 has 20 divisors (see below), whose sum is σ = 93543120. Its totient is φ = 16093376.

The previous prime is 40233517. The next prime is 40233521. The reversal of 40233520 is 2533204.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×40233520² = 3237472263180800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40233521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251380 + ... + 251539.

It is an arithmetic number, because the mean of its divisors is an integer number (4677156).

Almost surely, 2^40233520 is an apocalyptic number.

40233520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40233520 is an abundant number, since it is smaller than the sum of its proper divisors (53309600).

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

40233520 is a wasteful number, since it uses less digits than its factorization.

40233520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502932 (or 502926 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 40233520 is about 6342.9898313020. The cubic root of 40233520 is about 342.6594210509.

Adding to 40233520 its reverse (2533204), we get a palindrome (42766724).

The spelling of 40233520 in words is "forty million, two hundred thirty-three thousand, five hundred twenty".