78480621 has 24 divisors (see below), whose sum is σ = 120981120. Its totient is φ = 48879936.

The previous prime is 78480617. The next prime is 78480637. The reversal of 78480621 is 12608487.

It is not a de Polignac number, because 78480621 - 2² = 78480617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78480821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9340 + ... + 15626.

It is an arithmetic number, because the mean of its divisors is an integer number (5040880).

Almost surely, 2^78480621 is an apocalyptic number.

It is an amenable number.

78480621 is a deficient number, since it is larger than the sum of its proper divisors (42500499).

78480621 is a wasteful number, since it uses less digits than its factorization.

78480621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385 (or 6382 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78480621 is about 8858.9288855933. The cubic root of 78480621 is about 428.1416485330.

The spelling of 78480621 in words is "seventy-eight million, four hundred eighty thousand, six hundred twenty-one".