62778640 has 80 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 24095232.

The previous prime is 62778623. The next prime is 62778647. The reversal of 62778640 is 4687726.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 62778593 and 62778602.

It is not an unprimeable number, because it can be changed into a prime (62778647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375837 + ... + 376003.

Almost surely, 2^62778640 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 62778640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

62778640 is an abundant number, since it is smaller than the sum of its proper divisors (89211632).

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

62778640 is a wasteful number, since it uses less digits than its factorization.

62778640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 62778640 is about 7923.2972934253. The cubic root of 62778640 is about 397.4391399776.

The spelling of 62778640 in words is "sixty-two million, seven hundred seventy-eight thousand, six hundred forty".