77828641 has 8 divisors (see below), whose sum is σ = 85017024. Its totient is φ = 70659120.

The previous prime is 77828633. The next prime is 77828671. The reversal of 77828641 is 14682877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77828641 - 2³ = 77828633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77828671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755 + ... + 13351.

It is an arithmetic number, because the mean of its divisors is an integer number (10627128).

Almost surely, 2^77828641 is an apocalyptic number.

It is an amenable number.

77828641 is a deficient number, since it is larger than the sum of its proper divisors (7188383).

77828641 is a wasteful number, since it uses less digits than its factorization.

77828641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431.

The product of its digits is 150528, while the sum is 43.

The square root of 77828641 is about 8822.0542392348. The cubic root of 77828641 is about 426.9527505046.

The spelling of 77828641 in words is "seventy-seven million, eight hundred twenty-eight thousand, six hundred forty-one".