40123312 has 10 divisors (see below), whose sum is σ = 77738948. Its totient is φ = 20061648.

The previous prime is 40123301. The next prime is 40123313. The reversal of 40123312 is 21332104.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 2507707 = 40123312 / (4 + 0 + 1 + 2 + 3 + 3 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (40123313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253838 + ... + 1253869.

Almost surely, 2^40123312 is an apocalyptic number.

It is an amenable number.

40123312 is a deficient number, since it is larger than the sum of its proper divisors (37615636).

40123312 is a wasteful number, since it uses less digits than its factorization.

40123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507715 (or 2507709 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40123312 is about 6334.2964881666. The cubic root of 40123312 is about 342.3462630753.

Adding to 40123312 its reverse (21332104), we get a palindrome (61455416).

The spelling of 40123312 in words is "forty million, one hundred twenty-three thousand, three hundred twelve".