787986645 has 32 divisors (see below), whose sum is σ = 1279660032. Its totient is φ = 413996352.

The previous prime is 787986587. The next prime is 787986659. The reversal of 787986645 is 546689787.

It is not a de Polignac number, because 787986645 - 2¹⁶ = 787921109 is a prime.

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, 575752 + ... + 577118.

It is an arithmetic number, because the mean of its divisors is an integer number (39989376).

Almost surely, 2^787986645 is an apocalyptic number.

It is an amenable number.

787986645 is a deficient number, since it is larger than the sum of its proper divisors (491673387).

787986645 is a wasteful number, since it uses less digits than its factorization.

787986645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its digits is 20321280, while the sum is 60.

The square root of 787986645 is about 28071.0998181404. The cubic root of 787986645 is about 923.6475565472.

The spelling of 787986645 in words is "seven hundred eighty-seven million, nine hundred eighty-six thousand, six hundred forty-five".