78260149 has 12 divisors (see below), whose sum is σ = 86268672. Its totient is φ = 70406400.

The previous prime is 78260141. The next prime is 78260159. The reversal of 78260149 is 94106287.

It is not a de Polignac number, because 78260149 - 2³ = 78260141 is a prime.

It is a super-2 number, since 2×78260149² = 12249301843004402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78260141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405397 + ... + 405589.

It is an arithmetic number, because the mean of its divisors is an integer number (7189056).

Almost surely, 2^78260149 is an apocalyptic number.

It is an amenable number.

78260149 is a deficient number, since it is larger than the sum of its proper divisors (8008523).

78260149 is a wasteful number, since it uses less digits than its factorization.

78260149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 78260149 is about 8846.4766432744. The cubic root of 78260149 is about 427.7403529686.

The spelling of 78260149 in words is "seventy-eight million, two hundred sixty thousand, one hundred forty-nine".