40000002 has 16 divisors (see below), whose sum is σ = 91428672. Its totient is φ = 11428560.

The previous prime is 39999983. The next prime is 40000003. The reversal of 40000002 is 20000004.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (40000003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476149 + ... + 476232.

It is an arithmetic number, because the mean of its divisors is an integer number (5714292).

Almost surely, 2^40000002 is an apocalyptic number.

40000002 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

40000002 is an abundant number, since it is smaller than the sum of its proper divisors (51428670).

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

40000002 is a wasteful number, since it uses less digits than its factorization.

40000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952393.

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 40000002 is about 6324.5554784506. Note that the first 3 decimals coincide. The cubic root of 40000002 is about 341.9951950353.

Adding to 40000002 its reverse (20000004), we get a palindrome (60000006).

It can be divided in two parts, 4000000 and 2, that multiplied together give a cube (8000000 = 200³).

The spelling of 40000002 in words is "forty million, two", and thus it is an aban number, an eban number, and an uban number.