1542066820 has 48 divisors (see below), whose sum is σ = 3715447680. Its totient is φ = 526639104.

The previous prime is 1542066791. The next prime is 1542066829. The reversal of 1542066820 is 286602451.

It is not an unprimeable number, because it can be changed into a prime (1542066829) 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, 14551 + ... + 57409.

It is an arithmetic number, because the mean of its divisors is an integer number (77405160).

Almost surely, 2^1542066820 is an apocalyptic number.

1542066820 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 1542066820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857723840).

1542066820 is an abundant number, since it is smaller than the sum of its proper divisors (2173380860).

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

1542066820 is a wasteful number, since it uses less digits than its factorization.

1542066820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43132 (or 43130 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1542066820 is about 39269.1586362631. The cubic root of 1542066820 is about 1155.3167350326.

The spelling of 1542066820 in words is "one billion, five hundred forty-two million, sixty-six thousand, eight hundred twenty".