1142423440 has 40 divisors (see below), whose sum is σ = 2657707128. Its totient is φ = 456698880.

The previous prime is 1142423437. The next prime is 1142423449. The reversal of 1142423440 is 443242411.

It can be written as a sum of positive squares in 4 ways, for example, as 524176 + 1141899264 = 724^2 + 33792^2 .

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

It is a super-2 number, since 2×1142423440² = 2610262632522867200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1142423449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183580 + ... + 189700.

Almost surely, 2^1142423440 is an apocalyptic number.

1142423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142423440 is an abundant number, since it is smaller than the sum of its proper divisors (1515283688).

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

1142423440 is a wasteful number, since it uses less digits than its factorization.

1142423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8467 (or 8461 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1142423440 is about 33799.7550286981. The cubic root of 1142423440 is about 1045.3836461377.

Adding to 1142423440 its reverse (443242411), we get a palindrome (1585665851).

The spelling of 1142423440 in words is "one billion, one hundred forty-two million, four hundred twenty-three thousand, four hundred forty".