142597728 has 144 divisors (see below), whose sum is σ = 499183776. Its totient is φ = 37601280.

The previous prime is 142597711. The next prime is 142597729. The reversal of 142597728 is 827795241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×142597728² = 40668224061523968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142597729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23488 + ... + 28928.

It is an arithmetic number, because the mean of its divisors is an integer number (3466554).

Almost surely, 2^142597728 is an apocalyptic number.

142597728 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 142597728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249591888).

142597728 is an abundant number, since it is smaller than the sum of its proper divisors (356586048).

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

142597728 is a wasteful number, since it uses less digits than its factorization.

142597728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477 (or 5466 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 142597728 is about 11941.4290602088. The cubic root of 142597728 is about 522.4413407588.

The spelling of 142597728 in words is "one hundred forty-two million, five hundred ninety-seven thousand, seven hundred twenty-eight".