1542606440 has 16 divisors (see below), whose sum is σ = 3470864580. Its totient is φ = 617042560.

The previous prime is 1542606433. The next prime is 1542606493. The reversal of 1542606440 is 446062451.

It can be written as a sum of positive squares in 2 ways, for example, as 1481172196 + 61434244 = 38486^2 + 7838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1542606397 and 1542606406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19282541 + ... + 19282620.

Almost surely, 2^1542606440 is an apocalyptic number.

1542606440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1542606440 is an abundant number, since it is smaller than the sum of its proper divisors (1928258140).

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

1542606440 is a wasteful number, since it uses less digits than its factorization.

1542606440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38565172 (or 38565168 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1542606440 is about 39276.0288216617. The cubic root of 1542606440 is about 1155.4514804498.

Adding to 1542606440 its reverse (446062451), we get a palindrome (1988668891).

The spelling of 1542606440 in words is "one billion, five hundred forty-two million, six hundred six thousand, four hundred forty".