77085470 has 96 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 22714560.

The previous prime is 77085439. The next prime is 77085511. The reversal of 77085470 is 7458077.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160691 + ... + 161169.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^77085470 is an apocalyptic number.

77085470 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77085470 is an abundant number, since it is smaller than the sum of its proper divisors (106773730).

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

77085470 is a wasteful number, since it uses less digits than its factorization.

77085470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 77085470 is about 8779.8331419225. The cubic root of 77085470 is about 425.5894381777.

The spelling of 77085470 in words is "seventy-seven million, eighty-five thousand, four hundred seventy".