787428 has 48 divisors (see below), whose sum is σ = 2136960. Its totient is φ = 250272.

The previous prime is 787427. The next prime is 787429. The reversal of 787428 is 824787.

It is an interprime number because it is at equal distance from previous prime (787427) and next prime (787429).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 787392 and 787401.

It is not an unprimeable number, because it can be changed into a prime (787427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2326 + ... + 2642.

It is an arithmetic number, because the mean of its divisors is an integer number (44520).

2⁷⁸⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 787428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1068480).

787428 is an abundant number, since it is smaller than the sum of its proper divisors (1349532).

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

787428 is a wasteful number, since it uses less digits than its factorization.

787428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 345 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 787428 is about 887.3713991334. The cubic root of 787428 is about 92.3429230903.

The spelling of 787428 in words is "seven hundred eighty-seven thousand, four hundred twenty-eight".