1201403440 has 40 divisors (see below), whose sum is σ = 2940280560. Its totient is φ = 455268096.

The previous prime is 1201403381. The next prime is 1201403461. The reversal of 1201403440 is 443041021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393679 + ... + 396718.

It is an arithmetic number, because the mean of its divisors is an integer number (73507014).

Almost surely, 2^1201403440 is an apocalyptic number.

1201403440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201403440 is an abundant number, since it is smaller than the sum of its proper divisors (1738877120).

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

1201403440 is a wasteful number, since it uses less digits than its factorization.

1201403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790429 (or 790423 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1201403440 is about 34661.2671435999. The cubic root of 1201403440 is about 1063.0726793255.

Adding to 1201403440 its reverse (443041021), we get a palindrome (1644444461).

The spelling of 1201403440 in words is "one billion, two hundred one million, four hundred three thousand, four hundred forty".