787490640 has 160 divisors (see below), whose sum is σ = 2770536960. Its totient is φ = 205502976.

The previous prime is 787490633. The next prime is 787490657. The reversal of 787490640 is 46094787.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97642 + ... + 105398.

It is an arithmetic number, because the mean of its divisors is an integer number (17315856).

Almost surely, 2^787490640 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 787490640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385268480).

787490640 is an abundant number, since it is smaller than the sum of its proper divisors (1983046320).

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

787490640 is a wasteful number, since it uses less digits than its factorization.

787490640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7826 (or 7814 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 787490640 is about 28062.2636292941. The cubic root of 787490640 is about 923.4537165592.

The spelling of 787490640 in words is "seven hundred eighty-seven million, four hundred ninety thousand, six hundred forty".