40281512 has 8 divisors (see below), whose sum is σ = 75527850. Its totient is φ = 20140752.

The previous prime is 40281509. The next prime is 40281523. The reversal of 40281512 is 21518204.

It can be written as a sum of positive squares in only one way, i.e., 30758116 + 9523396 = 5546^2 + 3086^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40281512² = 3245200418012288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2517587 + ... + 2517602.

Almost surely, 2^40281512 is an apocalyptic number.

It is an amenable number.

40281512 is a deficient number, since it is larger than the sum of its proper divisors (35246338).

40281512 is a wasteful number, since it uses less digits than its factorization.

40281512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035195 (or 5035191 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40281512 is about 6346.7717778411. The cubic root of 40281512 is about 342.7956124370.

Adding to 40281512 its reverse (21518204), we get a palindrome (61799716).

The spelling of 40281512 in words is "forty million, two hundred eighty-one thousand, five hundred twelve".