402401649 has 8 divisors (see below), whose sum is σ = 577807552. Its totient is φ = 247631760.

The previous prime is 402401647. The next prime is 402401683. The reversal of 402401649 is 946104204.

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

It is not a de Polignac number, because 402401649 - 2¹ = 402401647 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402401647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5158957 + ... + 5159034.

It is an arithmetic number, because the mean of its divisors is an integer number (72225944).

Almost surely, 2^402401649 is an apocalyptic number.

It is an amenable number.

402401649 is a deficient number, since it is larger than the sum of its proper divisors (175405903).

402401649 is a wasteful number, since it uses less digits than its factorization.

402401649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10318007.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 402401649 is about 20059.9513708284. The cubic root of 402401649 is about 738.2779833507.

The spelling of 402401649 in words is "four hundred two million, four hundred one thousand, six hundred forty-nine".