402040633 has 4 divisors (see below), whose sum is σ = 425690100. Its totient is φ = 378391168.

The previous prime is 402040607. The next prime is 402040649. The reversal of 402040633 is 336040204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180983209 + 221057424 = 13453^2 + 14868^2 .

It is not a de Polignac number, because 402040633 - 2¹³ = 402032441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402040673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11824708 + ... + 11824741.

It is an arithmetic number, because the mean of its divisors is an integer number (106422525).

Almost surely, 2^402040633 is an apocalyptic number.

It is an amenable number.

402040633 is a deficient number, since it is larger than the sum of its proper divisors (23649467).

402040633 is a wasteful number, since it uses less digits than its factorization.

402040633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23649466.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 402040633 is about 20050.9509250808. The cubic root of 402040633 is about 738.0571344294.

Adding to 402040633 its reverse (336040204), we get a palindrome (738080837).

The spelling of 402040633 in words is "four hundred two million, forty thousand, six hundred thirty-three".