1401609808 has 10 divisors (see below), whose sum is σ = 2715619034. Its totient is φ = 700804896.

The previous prime is 1401609767. The next prime is 1401609821. The reversal of 1401609808 is 8089061041.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 959264784 + 442345024 = 30972^2 + 21032^2 .

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, 43800291 + ... + 43800322.

Almost surely, 2^1401609808 is an apocalyptic number.

It is an amenable number.

1401609808 is a deficient number, since it is larger than the sum of its proper divisors (1314009226).

1401609808 is an equidigital number, since it uses as much as digits as its factorization.

1401609808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87600621 (or 87600615 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1401609808 is about 37438.0796516061. The cubic root of 1401609808 is about 1119.1175574614.

The spelling of 1401609808 in words is "one billion, four hundred one million, six hundred nine thousand, eight hundred eight".