77773890 has 32 divisors (see below), whose sum is σ = 187701696. Its totient is φ = 20623680.

The previous prime is 77773873. The next prime is 77773907. The reversal of 77773890 is 9837777.

It is an interprime number because it is at equal distance from previous prime (77773873) and next prime (77773907).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1732 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (5865678).

Almost surely, 2^77773890 is an apocalyptic number.

77773890 is an abundant number, since it is smaller than the sum of its proper divisors (109927806).

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

77773890 is a wasteful number, since it uses less digits than its factorization.

77773890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14514.

The product of its (nonzero) digits is 518616, while the sum is 48.

The square root of 77773890 is about 8818.9506178456. The cubic root of 77773890 is about 426.8526092480.

The spelling of 77773890 in words is "seventy-seven million, seven hundred seventy-three thousand, eight hundred ninety".