36402640 has 20 divisors (see below), whose sum is σ = 84636324. Its totient is φ = 14561024.

The previous prime is 36402631. The next prime is 36402643. The reversal of 36402640 is 4620463.

36402640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20466576 + 15936064 = 4524^2 + 3992^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36402643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227437 + ... + 227596.

Almost surely, 2^36402640 is an apocalyptic number.

It is an amenable number.

36402640 is an abundant number, since it is smaller than the sum of its proper divisors (48233684).

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

36402640 is a wasteful number, since it uses less digits than its factorization.

36402640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455046 (or 455040 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 36402640 is about 6033.4600355020. The cubic root of 36402640 is about 331.4191712129.

The spelling of 36402640 in words is "thirty-six million, four hundred two thousand, six hundred forty".