402942449 has 16 divisors (see below), whose sum is σ = 525103488. Its totient is φ = 300056832.

The previous prime is 402942401. The next prime is 402942457. The reversal of 402942449 is 944249204.

It is a cyclic number.

It is not a de Polignac number, because 402942449 - 2¹⁶ = 402876913 is a prime.

It is a super-2 number, since 2×402942449² = 324725234412235202, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402942499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128687 + ... + 131780.

It is an arithmetic number, because the mean of its divisors is an integer number (32818968).

Almost surely, 2^402942449 is an apocalyptic number.

It is an amenable number.

402942449 is a deficient number, since it is larger than the sum of its proper divisors (122161039).

402942449 is a wasteful number, since it uses less digits than its factorization.

402942449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260504.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 402942449 is about 20073.4264389516. The cubic root of 402942449 is about 738.6085668264.

The spelling of 402942449 in words is "four hundred two million, nine hundred forty-two thousand, four hundred forty-nine".