40012402 has 8 divisors (see below), whose sum is σ = 62088300. Its totient is φ = 19316304.

The previous prime is 40012397. The next prime is 40012409. The reversal of 40012402 is 20421004.

It can be written as a sum of positive squares in 2 ways, for example, as 38452401 + 1560001 = 6201^2 + 1249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40012409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344877 + ... + 344992.

Almost surely, 2^40012402 is an apocalyptic number.

40012402 is a deficient number, since it is larger than the sum of its proper divisors (22075898).

40012402 is a wasteful number, since it uses less digits than its factorization.

40012402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689900.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40012402 is about 6325.5357085388. The cubic root of 40012402 is about 342.0305308859.

Adding to 40012402 its reverse (20421004), we get a palindrome (60433406).

The spelling of 40012402 in words is "forty million, twelve thousand, four hundred two".