402868090 has 8 divisors (see below), whose sum is σ = 725162580. Its totient is φ = 161147232.

The previous prime is 402868061. The next prime is 402868117. The reversal of 402868090 is 90868204.

It can be written as a sum of positive squares in 2 ways, for example, as 378730521 + 24137569 = 19461^2 + 4913^2 .

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

It is an unprimeable number.

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, 20143395 + ... + 20143414.

Almost surely, 2^402868090 is an apocalyptic number.

402868090 is a deficient number, since it is larger than the sum of its proper divisors (322294490).

402868090 is a wasteful number, since it uses less digits than its factorization.

402868090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40286816.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 402868090 is about 20071.5741784246. The cubic root of 402868090 is about 738.5631297560.

The spelling of 402868090 in words is "four hundred two million, eight hundred sixty-eight thousand, ninety".