77894646 has 16 divisors (see below), whose sum is σ = 164953584. Its totient is φ = 24437504.

The previous prime is 77894639. The next prime is 77894647. The reversal of 77894646 is 64649877.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77894647) 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, 381735 + ... + 381938.

It is an arithmetic number, because the mean of its divisors is an integer number (10309599).

Almost surely, 2^77894646 is an apocalyptic number.

77894646 is an abundant number, since it is smaller than the sum of its proper divisors (87058938).

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

77894646 is a wasteful number, since it uses less digits than its factorization.

77894646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763695.

The product of its digits is 2032128, while the sum is 51.

The square root of 77894646 is about 8825.7943551841. The cubic root of 77894646 is about 427.0734132541.

The spelling of 77894646 in words is "seventy-seven million, eight hundred ninety-four thousand, six hundred forty-six".