787428447 has 16 divisors (see below), whose sum is σ = 1131512928. Its totient is φ = 484208640.

The previous prime is 787428403. The next prime is 787428449. The reversal of 787428447 is 744824787.

It is not a de Polignac number, because 787428447 - 2¹⁶ = 787362911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 787428447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787428449) 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, 50943 + ... + 64575.

It is an arithmetic number, because the mean of its divisors is an integer number (70719558).

Almost surely, 2^787428447 is an apocalyptic number.

787428447 is a deficient number, since it is larger than the sum of its proper divisors (344084481).

787428447 is a wasteful number, since it uses less digits than its factorization.

787428447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130.

The product of its digits is 2809856, while the sum is 51.

The square root of 787428447 is about 28061.1554822677. The cubic root of 787428447 is about 923.4294056379.

The spelling of 787428447 in words is "seven hundred eighty-seven million, four hundred twenty-eight thousand, four hundred forty-seven".