78487650 has 96 divisors (see below), whose sum is σ = 221057280. Its totient is φ = 20468160.

The previous prime is 78487649. The next prime is 78487667. The reversal of 78487650 is 5678487.

It is a super-2 number, since 2×78487650² = 12320622405045000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 78487596 and 78487605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62832 + ... + 64068.

It is an arithmetic number, because the mean of its divisors is an integer number (2302680).

Almost surely, 2^78487650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78487650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110528640).

78487650 is an abundant number, since it is smaller than the sum of its proper divisors (142569630).

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

78487650 is a wasteful number, since it uses less digits than its factorization.

78487650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78487650 is about 8859.3255951003. The cubic root of 78487650 is about 428.1544301079.

The spelling of 78487650 in words is "seventy-eight million, four hundred eighty-seven thousand, six hundred fifty".