40020010 has 8 divisors (see below), whose sum is σ = 72036036. Its totient is φ = 16008000.

The previous prime is 40019981. The next prime is 40020011. The reversal of 40020010 is 1002004.

It can be written as a sum of positive squares in 2 ways, for example, as 38825361 + 1194649 = 6231^2 + 1093^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 40019975 and 40020002.

It is not an unprimeable number, because it can be changed into a prime (40020011) 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, 2000991 + ... + 2001010.

Almost surely, 2^40020010 is an apocalyptic number.

40020010 is a deficient number, since it is larger than the sum of its proper divisors (32016026).

40020010 is a wasteful number, since it uses less digits than its factorization.

40020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002008.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 40020010 is about 6326.1370519457. The cubic root of 40020010 is about 342.0522075264.

Adding to 40020010 its reverse (1002004), we get a palindrome (41022014).

The spelling of 40020010 in words is "forty million, twenty thousand, ten".