1400242720 has 48 divisors (see below), whose sum is σ = 3414797568. Its totient is φ = 542027520.

The previous prime is 1400242681. The next prime is 1400242721. The reversal of 1400242720 is 272420041.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1400242691 and 1400242700.

It is not an unprimeable number, because it can be changed into a prime (1400242721) 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, 136194 + ... + 146113.

It is an arithmetic number, because the mean of its divisors is an integer number (71141616).

Almost surely, 2^1400242720 is an apocalyptic number.

1400242720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400242720 is an abundant number, since it is smaller than the sum of its proper divisors (2014554848).

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

1400242720 is a wasteful number, since it uses less digits than its factorization.

1400242720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282353 (or 282345 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1400242720 is about 37419.8172096017. The cubic root of 1400242720 is about 1118.7535879123.

Adding to 1400242720 its reverse (272420041), we get a palindrome (1672662761).

The spelling of 1400242720 in words is "one billion, four hundred million, two hundred forty-two thousand, seven hundred twenty".