787428720 has 120 divisors (see below), whose sum is σ = 2847901056. Its totient is φ = 193826304.

The previous prime is 787428701. The next prime is 787428721. The reversal of 787428720 is 27824787.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-3 number, since 3×787428720³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787428721) 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, 32704 + ... + 51423.

Almost surely, 2^787428720 is an apocalyptic number.

It is an amenable number.

787428720 is an abundant number, since it is smaller than the sum of its proper divisors (2060472336).

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

787428720 is a wasteful number, since it uses less digits than its factorization.

787428720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84159 (or 84150 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 787428720 is about 28061.1603466428. The cubic root of 787428720 is about 923.4295123550.

The spelling of 787428720 in words is "seven hundred eighty-seven million, four hundred twenty-eight thousand, seven hundred twenty".