816377402 has 4 divisors (see below), whose sum is σ = 1224566106. Its totient is φ = 408188700.

The previous prime is 816377399. The next prime is 816377411. The reversal of 816377402 is 204773618.

816377402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 782376841 + 34000561 = 27971^2 + 5831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204094349 + ... + 204094352.

Almost surely, 2^816377402 is an apocalyptic number.

816377402 is a deficient number, since it is larger than the sum of its proper divisors (408188704).

816377402 is a wasteful number, since it uses less digits than its factorization.

816377402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408188703.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 816377402 is about 28572.3188068452. The cubic root of 816377402 is about 934.6097876993.

The spelling of 816377402 in words is "eight hundred sixteen million, three hundred seventy-seven thousand, four hundred two".