787478 has 4 divisors (see below), whose sum is σ = 1181220. Its totient is φ = 393738.

The previous prime is 787477. The next prime is 787483. The reversal of 787478 is 874787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874787 = 347 ⋅2521.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196868 + ... + 196871.

It is an arithmetic number, because the mean of its divisors is an integer number (295305).

2⁷⁸⁷⁴⁷⁸ is an apocalyptic number.

787478 is a deficient number, since it is larger than the sum of its proper divisors (393742).

787478 is a wasteful number, since it uses less digits than its factorization.

787478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393741.

The product of its digits is 87808, while the sum is 41.

The square root of 787478 is about 887.3995717826. The cubic root of 787478 is about 92.3448775752.

The spelling of 787478 in words is "seven hundred eighty-seven thousand, four hundred seventy-eight".