788651640 has 384 divisors, whose sum is σ = 3100930560. Its totient is φ = 176546304.

The previous prime is 788651629. The next prime is 788651651. The reversal of 788651640 is 46156887.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (788651629) and next prime (788651651).

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 95 ways as a sum of consecutive naturals, for example, 4558594 + ... + 4558766.

It is an arithmetic number, because the mean of its divisors is an integer number (8075340).

Almost surely, 2^788651640 is an apocalyptic number.

788651640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 788651640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550465280).

788651640 is an abundant number, since it is smaller than the sum of its proper divisors (2312278920).

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

788651640 is a wasteful number, since it uses less digits than its factorization.

788651640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 788651640 is about 28082.9421535565. The cubic root of 788651640 is about 923.9073106551.

The spelling of 788651640 in words is "seven hundred eighty-eight million, six hundred fifty-one thousand, six hundred forty".