77089890 has 32 divisors (see below), whose sum is σ = 185273856. Its totient is φ = 20528640.

The previous prime is 77089871. The next prime is 77089919. The reversal of 77089890 is 9898077.

It is a super-2 number, since 2×77089890² = 11885702280424200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28434 + ... + 31026.

It is an arithmetic number, because the mean of its divisors is an integer number (5789808).

Almost surely, 2^77089890 is an apocalyptic number.

77089890 is an abundant number, since it is smaller than the sum of its proper divisors (108183966).

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

77089890 is a wasteful number, since it uses less digits than its factorization.

77089890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 77089890 is about 8780.0848515262. The cubic root of 77089890 is about 425.5975723063.

The spelling of 77089890 in words is "seventy-seven million, eighty-nine thousand, eight hundred ninety".