402830749 has 4 divisors (see below), whose sum is σ = 411401664. Its totient is φ = 394259836.

The previous prime is 402830741. The next prime is 402830773. The reversal of 402830749 is 947038204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402830749 - 2³ = 402830741 is a prime.

It is a super-2 number, since 2×402830749² = 324545224679802002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402830741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4285387 + ... + 4285480.

It is an arithmetic number, because the mean of its divisors is an integer number (102850416).

Almost surely, 2^402830749 is an apocalyptic number.

It is an amenable number.

402830749 is a deficient number, since it is larger than the sum of its proper divisors (8570915).

402830749 is an equidigital number, since it uses as much as digits as its factorization.

402830749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570914.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 402830749 is about 20070.6439607702. The cubic root of 402830749 is about 738.5403104275.

The spelling of 402830749 in words is "four hundred two million, eight hundred thirty thousand, seven hundred forty-nine".