1406390091 has 16 divisors (see below), whose sum is σ = 1936535328. Its totient is φ = 907200000.

The previous prime is 1406390087. The next prime is 1406390129. The reversal of 1406390091 is 1900936041.

It is not a de Polignac number, because 1406390091 - 2² = 1406390087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1406390191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14910 + ... + 55091.

It is an arithmetic number, because the mean of its divisors is an integer number (121033458).

Almost surely, 2^1406390091 is an apocalyptic number.

1406390091 is a deficient number, since it is larger than the sum of its proper divisors (530145237).

1406390091 is a wasteful number, since it uses less digits than its factorization.

1406390091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70222.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1406390091 is about 37501.8678334826. The cubic root of 1406390091 is about 1120.3883886320.

The spelling of 1406390091 in words is "one billion, four hundred six million, three hundred ninety thousand, ninety-one".