78410628 has 18 divisors (see below), whose sum is σ = 198204734. Its totient is φ = 26136864.

The previous prime is 78410627. The next prime is 78410639. The reversal of 78410628 is 82601487.

It can be written as a sum of positive squares in only one way, i.e., 73822464 + 4588164 = 8592^2 + 2142^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×78410628² = 12296453166708768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2178073 = 78410628 / (7 + 8 + 4 + 1 + 0 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 78410592 and 78410601.

It is not an unprimeable number, because it can be changed into a prime (78410621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1089001 + ... + 1089072.

Almost surely, 2^78410628 is an apocalyptic number.

It is an amenable number.

78410628 is an abundant number, since it is smaller than the sum of its proper divisors (119794106).

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

78410628 is a wasteful number, since it uses less digits than its factorization.

78410628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178083 (or 2178078 counting only the distinct ones).

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

The square root of 78410628 is about 8854.9775832579. The cubic root of 78410628 is about 428.0143311939.

The spelling of 78410628 in words is "seventy-eight million, four hundred ten thousand, six hundred twenty-eight".