403028813 has 4 divisors (see below), whose sum is σ = 439667808. Its totient is φ = 366389820.

The previous prime is 403028783. The next prime is 403028819. The reversal of 403028813 is 318820304.

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 403028813 - 2⁸ = 403028557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403028819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18319481 + ... + 18319502.

It is an arithmetic number, because the mean of its divisors is an integer number (109916952).

Almost surely, 2^403028813 is an apocalyptic number.

It is an amenable number.

403028813 is a deficient number, since it is larger than the sum of its proper divisors (36638995).

403028813 is a wasteful number, since it uses less digits than its factorization.

403028813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36638994.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 403028813 is about 20075.5775259393. The cubic root of 403028813 is about 738.6613325366.

The spelling of 403028813 in words is "four hundred three million, twenty-eight thousand, eight hundred thirteen".