1542319440 has 80 divisors (see below), whose sum is σ = 4935446016. Its totient is φ = 398016000.

The previous prime is 1542319423. The next prime is 1542319453. The reversal of 1542319440 is 449132451.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 96211 + ... + 111090.

Almost surely, 2^1542319440 is an apocalyptic number.

1542319440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1542319440 is an abundant number, since it is smaller than the sum of its proper divisors (3393126576).

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

1542319440 is a wasteful number, since it uses less digits than its factorization.

1542319440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207348 (or 207342 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1542319440 is about 39272.3750236728. The cubic root of 1542319440 is about 1155.3798192375.

The spelling of 1542319440 in words is "one billion, five hundred forty-two million, three hundred nineteen thousand, four hundred forty".