403778996 has 6 divisors (see below), whose sum is σ = 706613250. Its totient is φ = 201889496.

The previous prime is 403778989. The next prime is 403779017. The reversal of 403778996 is 699877304.

It can be written as a sum of positive squares in only one way, i.e., 397204900 + 6574096 = 19930^2 + 2564^2 .

It is a super-2 number, since 2×403778996² = 326074955221536032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50472371 + ... + 50472378.

It is an arithmetic number, because the mean of its divisors is an integer number (117768875).

Almost surely, 2^403778996 is an apocalyptic number.

It is an amenable number.

403778996 is a deficient number, since it is larger than the sum of its proper divisors (302834254).

403778996 is a wasteful number, since it uses less digits than its factorization.

403778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100944753 (or 100944751 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 403778996 is about 20094.2528101943. The cubic root of 403778996 is about 739.1193541457.

The spelling of 403778996 in words is "four hundred three million, seven hundred seventy-eight thousand, nine hundred ninety-six".