1242381888 has 140 divisors (see below), whose sum is σ = 4017794352. Its totient is φ = 376462080.

The previous prime is 1242381799. The next prime is 1242381941. The reversal of 1242381888 is 8881832421.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46131 + ... + 67917.

Almost surely, 2^1242381888 is an apocalyptic number.

1242381888 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 1242381888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008897176).

1242381888 is an abundant number, since it is smaller than the sum of its proper divisors (2775412464).

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

1242381888 is a wasteful number, since it uses less digits than its factorization.

1242381888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21822 (or 21803 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 1242381888 is about 35247.4380345579. The cubic root of 1242381888 is about 1075.0245209478.

The spelling of 1242381888 in words is "one billion, two hundred forty-two million, three hundred eighty-one thousand, eight hundred eighty-eight".