402644073 has 8 divisors (see below), whose sum is σ = 578155648. Its totient is φ = 247780944.

The previous prime is 402644023. The next prime is 402644083. The reversal of 402644073 is 370446204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402644073 - 2⁶ = 402644009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402644073.

It is not an unprimeable number, because it can be changed into a prime (402644023) 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, 5162065 + ... + 5162142.

It is an arithmetic number, because the mean of its divisors is an integer number (72269456).

Almost surely, 2^402644073 is an apocalyptic number.

It is an amenable number.

402644073 is a deficient number, since it is larger than the sum of its proper divisors (175511575).

402644073 is a wasteful number, since it uses less digits than its factorization.

402644073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324223.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 402644073 is about 20065.9929482695. The cubic root of 402644073 is about 738.4262103550.

The spelling of 402644073 in words is "four hundred two million, six hundred forty-four thousand, seventy-three".