1442797440 has 128 divisors (see below), whose sum is σ = 5255953920. Its totient is φ = 329779200.

The previous prime is 1442797439. The next prime is 1442797469. The reversal of 1442797440 is 447972441.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1442797392 and 1442797401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40236 + ... + 67115.

It is an arithmetic number, because the mean of its divisors is an integer number (41062140).

Almost surely, 2^1442797440 is an apocalyptic number.

1442797440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1442797440 is an abundant number, since it is smaller than the sum of its proper divisors (3813156480).

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

1442797440 is a wasteful number, since it uses less digits than its factorization.

1442797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107380 (or 107368 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 1442797440 is about 37984.1735463601. The cubic root of 1442797440 is about 1129.9740093743.

The spelling of 1442797440 in words is "one billion, four hundred forty-two million, seven hundred ninety-seven thousand, four hundred forty".