802438690 has 8 divisors (see below), whose sum is σ = 1444389660. Its totient is φ = 320975472.

The previous prime is 802438687. The next prime is 802438739. The reversal of 802438690 is 96834208.

It can be written as a sum of positive squares in 2 ways, for example, as 800833401 + 1605289 = 28299^2 + 1267^2 .

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

It is a super-2 number, since 2×802438690² = 1287815702417832200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40121925 + ... + 40121944.

Almost surely, 2^802438690 is an apocalyptic number.

802438690 is a deficient number, since it is larger than the sum of its proper divisors (641950970).

802438690 is a wasteful number, since it uses less digits than its factorization.

802438690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80243876.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 802438690 is about 28327.3487993494. The cubic root of 802438690 is about 929.2600928757.

The spelling of 802438690 in words is "eight hundred two million, four hundred thirty-eight thousand, six hundred ninety".