142477440 has 128 divisors (see below), whose sum is σ = 519073920. Its totient is φ = 32563200.

The previous prime is 142477429. The next prime is 142477441. The reversal of 142477440 is 44774241.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (142477441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8140 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (4055265).

Almost surely, 2^142477440 is an apocalyptic number.

142477440 is a gapful number since it is divisible by the number (10) 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 142477440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259536960).

142477440 is an abundant number, since it is smaller than the sum of its proper divisors (376596480).

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

142477440 is a wasteful number, since it uses less digits than its factorization.

142477440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10630 (or 10618 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 33.

The square root of 142477440 is about 11936.3914144937. The cubic root of 142477440 is about 522.2943980184.

The spelling of 142477440 in words is "one hundred forty-two million, four hundred seventy-seven thousand, four hundred forty".