1542444420 has 96 divisors (see below), whose sum is σ = 4736269440. Its totient is φ = 371957760.

The previous prime is 1542444413. The next prime is 1542444479. The reversal of 1542444420 is 244442451.

1542444420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121326 + ... + 133434.

It is an arithmetic number, because the mean of its divisors is an integer number (49336140).

Almost surely, 2^1542444420 is an apocalyptic number.

1542444420 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 1542444420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2368134720).

1542444420 is an abundant number, since it is smaller than the sum of its proper divisors (3193825020).

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

1542444420 is a wasteful number, since it uses less digits than its factorization.

1542444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12325 (or 12323 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

The square root of 1542444420 is about 39273.9661862664. The cubic root of 1542444420 is about 1155.4110266658.

Adding to 1542444420 its reverse (244442451), we get a palindrome (1786886871).

The spelling of 1542444420 in words is "one billion, five hundred forty-two million, four hundred forty-four thousand, four hundred twenty".