77026140 has 108 divisors (see below), whose sum is σ = 243033336. Its totient is φ = 20505312.

The previous prime is 77026129. The next prime is 77026163. The reversal of 77026140 is 4162077.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130927 + ... + 131513.

Almost surely, 2^77026140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77026140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121516668).

77026140 is an abundant number, since it is smaller than the sum of its proper divisors (166007196).

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

77026140 is an equidigital number, since it uses as much as digits as its factorization.

77026140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 77026140 is about 8776.4537257368. The cubic root of 77026140 is about 425.4802230334.

The spelling of 77026140 in words is "seventy-seven million, twenty-six thousand, one hundred forty".