77467220 has 48 divisors (see below), whose sum is σ = 171884160. Its totient is φ = 29268096.

The previous prime is 77467219. The next prime is 77467241. The reversal of 77467220 is 2276477.

It is a congruent 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, 37166 + ... + 39194.

It is an arithmetic number, because the mean of its divisors is an integer number (3580920).

Almost surely, 2^77467220 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 77467220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85942080).

77467220 is an abundant number, since it is smaller than the sum of its proper divisors (94416940).

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

77467220 is a wasteful number, since it uses less digits than its factorization.

With its successor (77467221) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2142).

With its successor (77467221) it forms an eRAP, since the sums of their prime factors are consecutive (2144 and 2145).

77467220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2142 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 77467220 is about 8801.5464550271. The cubic root of 77467220 is about 426.2908297877.

The spelling of 77467220 in words is "seventy-seven million, four hundred sixty-seven thousand, two hundred twenty".