1490779800 has 144 divisors (see below), whose sum is σ = 5179356000. Its totient is φ = 383819520.

The previous prime is 1490779751. The next prime is 1490779817. The reversal of 1490779800 is 89770941.

1490779800 is a `hidden beast` number, since 1 + 490 + 77 + 98 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37921 + ... + 66479.

It is an arithmetic number, because the mean of its divisors is an integer number (35967750).

Almost surely, 2^1490779800 is an apocalyptic number.

1490779800 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 1490779800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589678000).

1490779800 is an abundant number, since it is smaller than the sum of its proper divisors (3688576200).

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

1490779800 is a wasteful number, since it uses less digits than its factorization.

1490779800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28610 (or 28598 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 1490779800 is about 38610.6177106764. The cubic root of 1490779800 is about 1142.3639772496.

The spelling of 1490779800 in words is "one billion, four hundred ninety million, seven hundred seventy-nine thousand, eight hundred".