1406401444 has 24 divisors (see below), whose sum is σ = 2833046720. Its totient is φ = 598405536.

The previous prime is 1406401411. The next prime is 1406401471. The reversal of 1406401444 is 4441046041.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 176787 + ... + 184570.

Almost surely, 2^1406401444 is an apocalyptic number.

1406401444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1406401444 is an abundant number, since it is smaller than the sum of its proper divisors (1426645276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1406401444 is a wasteful number, since it uses less digits than its factorization.

1406401444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361507 (or 361505 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 1406401444 is about 37502.0191989711. The cubic root of 1406401444 is about 1120.3914033800.

Adding to 1406401444 its reverse (4441046041), we get a palindrome (5847447485).

The spelling of 1406401444 in words is "one billion, four hundred six million, four hundred one thousand, four hundred forty-four".