1405444394 has 32 divisors (see below), whose sum is σ = 2239332480. Its totient is φ = 660160512.

The previous prime is 1405444367. The next prime is 1405444409. The reversal of 1405444394 is 4934445041.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1827242 + ... + 1828010.

It is an arithmetic number, because the mean of its divisors is an integer number (69979140).

Almost surely, 2^1405444394 is an apocalyptic number.

1405444394 is a deficient number, since it is larger than the sum of its proper divisors (833888086).

1405444394 is a wasteful number, since it uses less digits than its factorization.

1405444394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 1405444394 is about 37489.2570478531. The cubic root of 1405444394 is about 1120.1372052361.

The spelling of 1405444394 in words is "one billion, four hundred five million, four hundred forty-four thousand, three hundred ninety-four".