1490547840 has 64 divisors (see below), whose sum is σ = 4751127360. Its totient is φ = 397478912.

The previous prime is 1490547827. The next prime is 1490547841. The reversal of 1490547840 is 487450941.

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1490547792 and 1490547801.

It is not an unprimeable number, because it can be changed into a prime (1490547841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386244 + ... + 390083.

It is an arithmetic number, because the mean of its divisors is an integer number (74236365).

Almost surely, 2^1490547840 is an apocalyptic number.

1490547840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1490547840 is an abundant number, since it is smaller than the sum of its proper divisors (3260579520).

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

1490547840 is an equidigital number, since it uses as much as digits as its factorization.

1490547840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776349 (or 776337 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 1490547840 is about 38607.6137568744. The cubic root of 1490547840 is about 1142.3047249279.

The spelling of 1490547840 in words is "one billion, four hundred ninety million, five hundred forty-seven thousand, eight hundred forty".