1142899398 has 24 divisors (see below), whose sum is σ = 2492060688. Its totient is φ = 378538992.

The previous prime is 1142899393. The next prime is 1142899453. The reversal of 1142899398 is 8939982411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142899393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199386 + ... + 205037.

It is an arithmetic number, because the mean of its divisors is an integer number (103835862).

Almost surely, 2^1142899398 is an apocalyptic number.

1142899398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1142899398 is an abundant number, since it is smaller than the sum of its proper divisors (1349161290).

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

1142899398 is a wasteful number, since it uses less digits than its factorization.

1142899398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404588 (or 404585 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 1142899398 is about 33806.7951453550. The cubic root of 1142899398 is about 1045.5288023644.

The spelling of 1142899398 in words is "one billion, one hundred forty-two million, eight hundred ninety-nine thousand, three hundred ninety-eight".