142004400 has 120 divisors (see below), whose sum is σ = 481714704. Its totient is φ = 35635200.

The previous prime is 142004399. The next prime is 142004431. The reversal of 142004400 is 4400241.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 142004400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16920 + ... + 23880.

Almost surely, 2^142004400 is an apocalyptic number.

142004400 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 142004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240857352).

142004400 is an abundant number, since it is smaller than the sum of its proper divisors (339710304).

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

142004400 is a wasteful number, since it uses less digits than its factorization.

142004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999 (or 6988 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 142004400 is about 11916.5599062817. The cubic root of 142004400 is about 521.7157331295.

Adding to 142004400 its reverse (4400241), we get a palindrome (146404641).

The spelling of 142004400 in words is "one hundred forty-two million, four thousand, four hundred".