787021040 has 80 divisors (see below), whose sum is σ = 2074346400. Its totient is φ = 275291136.

The previous prime is 787021033. The next prime is 787021091. The reversal of 787021040 is 40120787.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 787020994 and 787021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155 + ... + 39674.

It is an arithmetic number, because the mean of its divisors is an integer number (25929330).

Almost surely, 2^787021040 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 787021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1037173200).

787021040 is an abundant number, since it is smaller than the sum of its proper divisors (1287325360).

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

787021040 is a wasteful number, since it uses less digits than its factorization.

787021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39874 (or 39868 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 787021040 is about 28053.8952732058. The cubic root of 787021040 is about 923.2701206868.

The spelling of 787021040 in words is "seven hundred eighty-seven million, twenty-one thousand, forty".