402439073 has 8 divisors (see below), whose sum is σ = 420139968. Its totient is φ = 384755184.

The previous prime is 402439069. The next prime is 402439099. The reversal of 402439073 is 370934204.

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

It is a cyclic number.

It is not a de Polignac number, because 402439073 - 2² = 402439069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402439033) 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, 79115 + ... + 84047.

It is an arithmetic number, because the mean of its divisors is an integer number (52517496).

Almost surely, 2^402439073 is an apocalyptic number.

It is an amenable number.

402439073 is a deficient number, since it is larger than the sum of its proper divisors (17700895).

402439073 is a wasteful number, since it uses less digits than its factorization.

402439073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 402439073 is about 20060.8841529978. The cubic root of 402439073 is about 738.3008696542.

The spelling of 402439073 in words is "four hundred two million, four hundred thirty-nine thousand, seventy-three".