77060730 has 128 divisors (see below), whose sum is σ = 204374016. Its totient is φ = 18547200.

The previous prime is 77060729. The next prime is 77060759. The reversal of 77060730 is 3706077.

It is a happy number.

It is a super-2 number, since 2×77060730² = 11876712216265800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1639567 + ... + 1639613.

It is an arithmetic number, because the mean of its divisors is an integer number (1596672).

Almost surely, 2^77060730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77060730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102187008).

77060730 is an abundant number, since it is smaller than the sum of its proper divisors (127313286).

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

77060730 is a wasteful number, since it uses less digits than its factorization.

77060730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 6174, while the sum is 30.

The square root of 77060730 is about 8778.4241182572. The cubic root of 77060730 is about 425.5439033997.

The spelling of 77060730 in words is "seventy-seven million, sixty thousand, seven hundred thirty".