1493428878 has 48 divisors (see below), whose sum is σ = 3284045856. Its totient is φ = 490429440.

The previous prime is 1493428873. The next prime is 1493428889. The reversal of 1493428878 is 8788243941.

It is a happy number.

1493428878 is a `hidden beast` number, since 1 + 493 + 4 + 2 + 88 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1493428873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404983 + ... + 408653.

It is an arithmetic number, because the mean of its divisors is an integer number (68417622).

Almost surely, 2^1493428878 is an apocalyptic number.

1493428878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1493428878 is an abundant number, since it is smaller than the sum of its proper divisors (1790616978).

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

1493428878 is a wasteful number, since it uses less digits than its factorization.

1493428878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009 (or 4006 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 1493428878 is about 38644.9075299709. The cubic root of 1493428878 is about 1143.0402274795.

The spelling of 1493428878 in words is "one billion, four hundred ninety-three million, four hundred twenty-eight thousand, eight hundred seventy-eight".