1142403408 has 60 divisors (see below), whose sum is σ = 3209982048. Its totient is φ = 379272000.

The previous prime is 1142403391. The next prime is 1142403421. The reversal of 1142403408 is 8043042411.

1142403408 is a `hidden beast` number, since 1 + 14 + 240 + 3 + 408 = 666.

It is a super-2 number, since 2×1142403408² = 2610171093220028928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20341 + ... + 51947.

Almost surely, 2^1142403408 is an apocalyptic number.

1142403408 is a gapful number since it is divisible by the number (18) 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 1142403408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604991024).

1142403408 is an abundant number, since it is smaller than the sum of its proper divisors (2067578640).

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

1142403408 is a wasteful number, since it uses less digits than its factorization.

1142403408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31872 (or 31863 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1142403408 is about 33799.4586938904. The cubic root of 1142403408 is about 1045.3775359551.

Adding to 1142403408 its reverse (8043042411), we get a palindrome (9185445819).

It can be divided in two parts, 1142 and 403408, that added together give a triangular number (404550 = T₈₉₉).

The spelling of 1142403408 in words is "one billion, one hundred forty-two million, four hundred three thousand, four hundred eight".