60778440 has 96 divisors (see below), whose sum is σ = 198764280. Its totient is φ = 16106496.

The previous prime is 60778433. The next prime is 60778463. The reversal of 60778440 is 4487706.

It is a happy number.

60778440 is a `hidden beast` number, since 607 + 7 + 8 + 4 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60000516 + 777924 = 7746^2 + 882^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 60778395 and 60778404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70492 + ... + 71348.

Almost surely, 2^60778440 is an apocalyptic number.

60778440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60778440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99382140).

60778440 is an abundant number, since it is smaller than the sum of its proper divisors (137985840).

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

60778440 is a wasteful number, since it uses less digits than its factorization.

60778440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 60778440 is about 7796.0528474350. The cubic root of 60778440 is about 393.1725443225.

The spelling of 60778440 in words is "sixty million, seven hundred seventy-eight thousand, four hundred forty".