1403422728 has 32 divisors (see below), whose sum is σ = 3603384960. Its totient is φ = 455163840.

The previous prime is 1403422721. The next prime is 1403422729. The reversal of 1403422728 is 8272243041.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1403422721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789328 + ... + 791103.

It is an arithmetic number, because the mean of its divisors is an integer number (112605780).

Almost surely, 2^1403422728 is an apocalyptic number.

It is an amenable number.

1403422728 is an abundant number, since it is smaller than the sum of its proper divisors (2199962232).

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

1403422728 is a wasteful number, since it uses less digits than its factorization.

1403422728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580477 (or 1580473 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 1403422728 is about 37462.2840734518. The cubic root of 1403422728 is about 1119.5998591851.

Adding to 1403422728 its reverse (8272243041), we get a palindrome (9675665769).

The spelling of 1403422728 in words is "one billion, four hundred three million, four hundred twenty-two thousand, seven hundred twenty-eight".