402154444 has 12 divisors (see below), whose sum is σ = 726472768. Its totient is φ = 194590800.

The previous prime is 402154439. The next prime is 402154451. The reversal of 402154444 is 444451204.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621467 + ... + 1621714.

Almost surely, 2^402154444 is an apocalyptic number.

It is an amenable number.

402154444 is a deficient number, since it is larger than the sum of its proper divisors (324318324).

402154444 is a wasteful number, since it uses less digits than its factorization.

402154444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243216 (or 3243214 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 402154444 is about 20053.7887692077. The cubic root of 402154444 is about 738.1267717485.

It can be divided in two parts, 402 and 154444, that added together give a triangular number (154846 = T₅₅₆).

The spelling of 402154444 in words is "four hundred two million, one hundred fifty-four thousand, four hundred forty-four".