1406221320 has 64 divisors (see below), whose sum is σ = 4821333120. Its totient is φ = 321421824.

The previous prime is 1406221307. The next prime is 1406221337. The reversal of 1406221320 is 231226041.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836197 + ... + 837876.

It is an arithmetic number, because the mean of its divisors is an integer number (75333330).

Almost surely, 2^1406221320 is an apocalyptic number.

1406221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1406221320 is an abundant number, since it is smaller than the sum of its proper divisors (3415111800).

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

1406221320 is a wasteful number, since it uses less digits than its factorization.

1406221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674094 (or 1674090 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1406221320 is about 37499.6175980502. The cubic root of 1406221320 is about 1120.3435701912.

Adding to 1406221320 its reverse (231226041), we get a palindrome (1637447361).

The spelling of 1406221320 in words is "one billion, four hundred six million, two hundred twenty-one thousand, three hundred twenty".