40251402 has 12 divisors (see below), whose sum is σ = 87211410. Its totient is φ = 13417128.

The previous prime is 40251401. The next prime is 40251437. The reversal of 40251402 is 20415204.

It can be written as a sum of positive squares in only one way, i.e., 27783441 + 12467961 = 5271^2 + 3531^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2236189 = 40251402 / (4 + 0 + 2 + 5 + 1 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (40251401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1118077 + ... + 1118112.

Almost surely, 2^40251402 is an apocalyptic number.

40251402 is an abundant number, since it is smaller than the sum of its proper divisors (46960008).

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

40251402 is a wasteful number, since it uses less digits than its factorization.

40251402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236197 (or 2236194 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40251402 is about 6344.3992623415. The cubic root of 40251402 is about 342.7101791269.

Adding to 40251402 its reverse (20415204), we get a palindrome (60666606).

The spelling of 40251402 in words is "forty million, two hundred fifty-one thousand, four hundred two".