1402442440 has 128 divisors (see below), whose sum is σ = 3815424000. Its totient is φ = 453212928.

The previous prime is 1402442429. The next prime is 1402442443. The reversal of 1402442440 is 442442041.

It is not an unprimeable number, because it can be changed into a prime (1402442443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1270929 + ... + 1272031.

It is an arithmetic number, because the mean of its divisors is an integer number (29808000).

Almost surely, 2^1402442440 is an apocalyptic number.

1402442440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402442440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907712000).

1402442440 is an abundant number, since it is smaller than the sum of its proper divisors (2412981560).

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

1402442440 is a wasteful number, since it uses less digits than its factorization.

1402442440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1402442440 is about 37449.1981222562. The cubic root of 1402442440 is about 1119.3391190377.

Adding to 1402442440 its reverse (442442041), we get a palindrome (1844884481).

The spelling of 1402442440 in words is "one billion, four hundred two million, four hundred forty-two thousand, four hundred forty".