398626402 has 8 divisors (see below), whose sum is σ = 618558300. Its totient is φ = 192440304.

The previous prime is 398626381. The next prime is 398626439. The reversal of 398626402 is 204626893.

It can be written as a sum of positive squares in 2 ways, for example, as 390892441 + 7733961 = 19771^2 + 2781^2 .

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

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, 3436377 + ... + 3436492.

Almost surely, 2^398626402 is an apocalyptic number.

398626402 is a deficient number, since it is larger than the sum of its proper divisors (219931898).

398626402 is a wasteful number, since it uses less digits than its factorization.

398626402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872900.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 398626402 is about 19965.6305184685. The cubic root of 398626402 is about 735.9619360927.

It can be divided in two parts, 39862 and 6402, that added together give a palindrome (46264).

The spelling of 398626402 in words is "three hundred ninety-eight million, six hundred twenty-six thousand, four hundred two".