788378531 has 4 divisors (see below), whose sum is σ = 791376432. Its totient is φ = 785380632.

The previous prime is 788378527. The next prime is 788378561. The reversal of 788378531 is 135873887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 788378531 - 2² = 788378527 is a prime.

It is a super-2 number, since 2×788378531² = 1243081416283435922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 788378531.

It is not an unprimeable number, because it can be changed into a prime (788378561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498556 + ... + 1499081.

It is an arithmetic number, because the mean of its divisors is an integer number (197844108).

Almost surely, 2^788378531 is an apocalyptic number.

788378531 is a deficient number, since it is larger than the sum of its proper divisors (2997901).

788378531 is a wasteful number, since it uses less digits than its factorization.

788378531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997900.

The product of its digits is 1128960, while the sum is 50.

The square root of 788378531 is about 28078.0791900016. The cubic root of 788378531 is about 923.8006490564.

The spelling of 788378531 in words is "seven hundred eighty-eight million, three hundred seventy-eight thousand, five hundred thirty-one".