1494278820 has 192 divisors, whose sum is σ = 4790016000. Its totient is φ = 386560512.

The previous prime is 1494278809. The next prime is 1494278827. The reversal of 1494278820 is 288724941.

1494278820 is a `hidden beast` number, since 149 + 427 + 8 + 82 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1494278827) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3119341 + ... + 3119819.

It is an arithmetic number, because the mean of its divisors is an integer number (24948000).

Almost surely, 2^1494278820 is an apocalyptic number.

1494278820 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 1494278820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2395008000).

1494278820 is an abundant number, since it is smaller than the sum of its proper divisors (3295737180).

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

1494278820 is a wasteful number, since it uses less digits than its factorization.

1494278820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1494278820 is about 38655.9027834042. The cubic root of 1494278820 is about 1143.2570291555.

The spelling of 1494278820 in words is "one billion, four hundred ninety-four million, two hundred seventy-eight thousand, eight hundred twenty".