402294638 has 16 divisors (see below), whose sum is σ = 635610240. Its totient is φ = 190438200.

The previous prime is 402294637. The next prime is 402294643. The reversal of 402294638 is 836492204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402294637) 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 7 ways as a sum of consecutive naturals, for example, 89423 + ... + 93813.

It is an arithmetic number, because the mean of its divisors is an integer number (39725640).

Almost surely, 2^402294638 is an apocalyptic number.

402294638 is a deficient number, since it is larger than the sum of its proper divisors (233315602).

402294638 is a wasteful number, since it uses less digits than its factorization.

402294638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 402294638 is about 20057.2839138304. The cubic root of 402294638 is about 738.2125339259.

The spelling of 402294638 in words is "four hundred two million, two hundred ninety-four thousand, six hundred thirty-eight".